EP3115122A1 - Device and method for stripping/ejecting a stamping frame/internally moulded part and ejection of a cut part in a precision cutting press - Google Patents
Device and method for stripping/ejecting a stamping frame/internally moulded part and ejection of a cut part in a precision cutting press Download PDFInfo
- Publication number
- EP3115122A1 EP3115122A1 EP15002020.4A EP15002020A EP3115122A1 EP 3115122 A1 EP3115122 A1 EP 3115122A1 EP 15002020 A EP15002020 A EP 15002020A EP 3115122 A1 EP3115122 A1 EP 3115122A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pressure
- stripping
- ejection
- counter
- 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
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- 238000005520 cutting process Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000012530 fluid Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 210000003108 foot joint Anatomy 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1818—Means for removing cut-out material or waste by pushing out
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/20—Applications of drives for reducing noise or wear
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
- B30B1/36—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure having telescoping plungers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/32—Discharging presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D2007/189—Mounting blanking, stripping and break-out tools
Definitions
- the invention relates to a device for stripping a stamped grid, ejecting an inner molding and ejecting a cutting part in a fine blanking press, with a arranged in the top ring cylinder cylinder in which a pressure chamber with hydraulic fluid acted upon annular toothed piston for generating a force acting on a serrated annular tooth force is performed in the Base arranged master cylinder, in which via a pressure chamber with hydraulic fluid acted upon, a lifting movement in the direction Hubachse exporting and a table top carrying main piston / plunger is guided with a counter-pressure piston acting on counter-piston to generate a counterforce and a hydraulic system for Supplying the arranged in the top and bottom pressure chambers with the adjusted to a predetermined working pressure by a central control hydraulic fluid.
- the invention further relates to a method for stripping a punched grid from the cutting punch, ejecting an inner mold and ejecting a cutting part from the cutting plate of a tool in a fine blanking press with a arranged in the foot upwardly moving main piston, in the first with a arranged in the head of the press ring-toothed piston over Ringtooth pin acting on a leading or serrated plate ring tooth force for pressing the ring teeth in the cutting material and with a counter-piston arranged in the foot generates a counter-holding counter-holding force, then cutting the hydraulic fluid from the pressure chambers of the Ringzacken- or counter-holding piston at an adjustable pressure displaced and after completion of cutting the pressure chamber of the annular toothed piston in the head piece and the pressure chamber of the counter-holding piston in the foot piece with a hydraulic fluid adjusted to a predetermined working pressure d acted upon by a hydraulic system and by a central control to a predetermined, the punched grid stripping and the inner mold part ejecting
- the fineblanking tool comprises an upper part and a lower part.
- the upper part includes at least one guide or ring plate plate, which is acted upon by pressure pins with a serrated piston of a fine cutting press Ringzackenkraft, guided in the guide or ring serrated cutting punch for cutting a cutting part of the cutting material and an ejector for ejecting an inner molding from the cutting punch.
- the lower part contains a cutting plate or die, an ejector guided in the cutting punch, which is acted upon by pressure pins with a counterforce produced by a counter-holding piston of the fineblanking press and counteracting the cutting punch.
- the cutting material is clamped between the guide plate and the cutting plate.
- the ring-tooth force located in the leadership or ring serrated annular teeth in the cutting material is pressed by the ring-tooth force.
- this force is displaced by the high-speed main piston, which strips the punched grid from the cutting punch after the end of the cutting and ejects the inner mold into the opened tool cavity.
- the counterforce generated by the counter-holding piston presses against the cutting punch and is overcome by the cutting force.
- this force throws the pressed into the insert cutting part in the tool room (" Forming and fineblanking, manual for procedures, materials, partial design ", P. 141-153, publishing house Hallwag AG, 1997 ).
- the fineblanking process requires special triple-acting presses, which basically work from the bottom up and a controlled control of the cutting process with the Enable auxiliary functions for the ring point, counterholder and ejector.
- the ring-tooth force and counter-holding force are generated hydraulically and the cutting force is generated mechanically or hydraulically.
- piston assemblies that are used in presses for driving or pressurizing.
- a triple-acting hydraulic press which has a working piston, an annular piston surrounding this, an opposed piston and located between the working piston and the ring piston, closable by means of a pressure regulating valve gap.
- the DE 1 279 622 A1 is a fine blanking press with a cutting piston, a sheet metal workpiece pressing on the press table pressing piston and a part to be punched out of the workpiece supporting counter-pressure piston described, the cutting piston is resiliently guided in the plunger.
- a press in particular for fine blanking, with two ram systems, to each of which a tool half is fastened.
- At least one ram system consists of two independently operable piston systems, each of which can optionally be fixed individually to the press frame.
- DE 2 218 476 A1 and DE 2 264 429 A1 it is a fine blanking press with two rigidly interconnected frame bodies, to which two serving for clamping two tool parts, mounted on a hydraulic path axially towards each other and away from each other movable table body.
- a cylinder space is provided, in which two coaxial, with respect to each other movable pistons are arranged, of which the first is connected to a piston rod and the second surrounds this piston rod and forms part of the first frame body displaceably mounted on the first frame body.
- the second piston has an internal thread and is screwed onto an externally threaded bush, so that the axial position of the second piston is adjustable.
- the work stamp assembly includes a primary punch and a secondary punch that are substantially coaxially disposed and axially movable relative to each other, wherein the primary punch is slidable axially in an axial bore of the secondary punch.
- a fine blanking press with hydraulically or mechanically driven ram with at least one each known a hydraulic Ringzacken- and counter-holding cylinder.
- the ring gear cylinder and the counter-holding cylinder are arranged in a support cylinder, which is held in constant contact with pressure pins via connecting elements, wherein the support cylinder at the end of the working stroke pushes the ring-jaw piston in its lower starting position when lifting the work force, so that the pressure pin eject the punched grid.
- the annular toothed cylinder is housed in a cylinder housing in a traverse, in which a ring-shaped piston is guided, which is held by a piston of the pressure-medium-loaded cylinder in a position which is in constant contact with the pressure pin.
- the serrated piston acts as the stripping / ejecting element and the Containment piston as the ejection of the cutting part initiating element that perform the stripping / ejecting and ejecting the same effective area as when displacing the ring-jaw piston / counter-holding piston.
- the displaced during the working stroke volume of the ring-jaw cylinder and counter-holding cylinder is fed to a pressure accumulator.
- the volume displacement remains dependent on the serrated piston, so that one of the ring-tooth force or counter-holding force is independent Adaptation of the stripping / ejection force and ejector force to the real power requirement is not possible.
- the force in the ring-jaw cylinder and counter-holding cylinder must always be equal to or greater than the ejection / Auswerferkraft, whereby the applications are limited.
- the hydraulic circuit is complicated and expensive by the control within the ring-shaped piston.
- the present invention seeks to provide an apparatus and a method for stripping / ejecting a stamped grid or inner molding and ejecting a cutting part from a tool in a fine blanking press, with which the stripping / ejection force and the ejection force independently from the ring-jaw force and counter-holding force with reduction of the piston mass of the serrated and counter-holding piston, the increase of the stripping / ejection and ejection speed while simultaneously simplifying the hydraulic circuit is adjustable.
- the solution according to the invention is based on Recognition of performing the stripping of the punched grid, the ejection of the inner mold part and the ejection of the cutting part separately and independently of the function of the Ringzacken- and counter-holding piston.
- This is achieved in that the annular toothed piston with a stripping / ejection piston and the counter-holding piston with an ejector each in the head and foot piece of a separate annular piston or counter-piston structural unit with independent pressure chambers for the stripping / ejection piston on the one hand and the ejector piston on the other form, wherein the pressure chambers of the stripping / ejection piston and Auswerferkolbens communicate with each other via a first controllable hydraulic circuit of the hydraulic system and the pressure chambers of the ring-toothed piston and counter-holding piston via a second controllable hydraulic circuit.
- a further preferred embodiment of the device according to the invention provides that the stripping / ejection piston is arranged in a stripping / ejection cylinder separated from the serrated cylinder, which is fastened pressure-tightly and non-positively on the serrated cylinder in the direction of the stroke axis, a piston rod of the stripping - / ejection piston passes through the guided in the serrated cylinder ring-serrated piston center and is fixed to a ring-toothed piston foot-side associated ejection plate so that stripping / ejection piston and serrated piston independently can perform a lifting movement. This ensures that both pistons can be driven independently of each other and hydraulically controlled.
- the serrated pins are arranged coaxially to the stroke axis in the ring-jaw cylinder and are supported on a serrated piston plate for moving the ring spike, wherein the serrated piston plate surrounds a support body having through holes in which the pressure bolts are arranged to move vertically movable.
- the stripping / ejection piston can be designed to be double acting according to a further preferred embodiment of the device, which is associated with a first and second pressure chamber in the stripping / ejection cylinder.
- the stripping / ejection cylinder is pressure-tightly closed by a cover connected to the hydraulic system hydraulic line for pressurizing the first pressure chamber with predetermined pressure from the first hydraulic circuit.
- the stripping / ejection cylinder is provided in its wall region with a parallel and perpendicular to the stroke axis extending channel for applying the second pressure chamber with hydraulic fluid predetermined pressure from the first hydraulic circuit of the hydraulic system. This ensures that the cylinder space of the stripping / Ejecting cylinder and the serrated cylinder chamber each separately from each other with fluid can be acted upon correspondingly adapted pressure. All of these features also ensure that the scraper-discharge cylinder forms a compact unit with the ring-jaw cylinder or counter-holding cylinder and can be easily and simply connected to the hydraulic system.
- aelleshaltezylinderraum is formed for the counter-holding piston in which an axially displaceable in the stroke direction ejector piston is arranged, the piston rod penetrates the counter-holding piston in the middle and leads into the separate pressure chamber, by a in Main piston is perpendicular to the stroke axis lying channel with the first hydraulic circuit of the hydraulic system for applying hydraulic fluid predetermined pressure is connected, wherein ejector piston and counter-holding piston can independently perform a lifting movement.
- the main piston is provided with a parallel and perpendicular to the Hubachse extending channel for acting on the pressure chamber of the counter-holding piston with hydraulic fluid predetermined pressure from the second hydraulic circuit of the hydraulic system.
- channels for supplying hydraulic fluid predetermined pressure from the hydraulic system are introduced into the foot piece, so that each pressure chamber can be applied separately according to the required pressures, thereby ensuring is that the ejector piston and the counter-holding piston can be controlled independently of each other.
- the first hydraulic circuit comprises a high-pressure accumulator for the pressure chambers, which is set by the hydraulic system by a cartridge valve to the working pressure of the stripping / ejection piston and the ejector piston, at least one 4/3-way valve assigned to each pressure chamber by the stripping / ejection piston and ejector piston.
- Proportional valve for switching on and off of the pressure chambers, the proportional valve, a pressure transducer and the proportional valve, a pressure sensor for the control of the cartridge valve are assigned.
- the second hydraulic circuit comprises at least one plug-in valve connecting the two pressure chambers of serrated and counter-holding pistons and adjusting the working pressure, at least one pressure sensor for actuating the cartridge valve and at least one hydraulic pump unit, the at least one cartridge valve for adjusting the delivery rate, at least one pressure sensor for controlling the cartridge valve and at least one pressure relief valve for pressure limiting and maintaining the delivery flow is assigned.
- the second hydraulic circuit thus operates independently and independently of the first hydraulic circuit, the cartridge valves are controlled via the pressure transducer from the central control.
- the object is further achieved by a method in that the stripping / ejection force and the ring-tooth force and the Auswerferkraft and counter-holding force are generated in separate pressure chambers with correspondingly adapted to the stripping / ejection and ejection active surfaces, the pressure chambers for the stripping / Ejection force and the pressure chambers for the serration and counter-holding force with hydraulic fluid preset pressure from the central control in separate hydraulic circuits of the hydraulic system are controlled so that ring-toothed piston and counter-retaining piston the scraper / ejection piston or Auswerfkolben when stripping or Aus finedem lag.
- the active surfaces in the pressure chambers for stripping / ejection and ejection can be chosen to be the same or different sizes, so that the height of the stripping / ejection force and the ejector force can be set independently of the size of the serrated and counter-holding force.
- the Fig. 1 shows the working principle of fine blanking in the manufacture of a cutting part 1 with an inner shape in a cutting tool 2, which is composed of an upper part 3 and lower part 4. Between insert 5 of the lower part 4 and the guide or annular serrated plate 6 of the upper part 3, the cutting material 7 is clamped. The annular serration force F R acting on the guide or annular serrated plate 6 via pressure bolts 8 has pressed into the cutting material 7 the annular serrations 9 located in the guide or annular serrated plate 6.
- the cutting punch 10 which is guided by the guide or annular serrated plate 6, cuts in the position shown with the cutting force F S in the cutting material 7, wherein the cutting punch 10, a counter-holder 11 counteracts the counter force F G , the pressure pin 12 on the counter-holder 11 is applied.
- the punch 13 is guided in the counter-holder 11 and cuts the inner mold against the cutting force F S of the cutting punch 10 in the cutting material 7 a.
- the ejector 14 acts as a counter-holder of the punch 13th
- the stripping / ejection process of the lead frame 15 and the cutting part 1 is shown schematically. Even before the start of cutting, the ring tooth 9 is pressed into the cutting material 7 outside the cutting line.
- the force F R is displaced by the high-speed main piston / plunger of fineblanking press and stripped by the stripping force F RA after cutting end with open tool punched grid 15 from the cutting punch 10 and ejected the inner mold into the tool room.
- the counterforce F G acts at the beginning of cutting immediately opposite the cutting punch 10 and is overcome by the cutting force F S.
- the ejector force F GA ejects the cutting part 1 from the cutting opening of the cutting plate 5.
- the pressure pin 8 for the lead or ring serrated plate. 6 and the pressure pins 12 for the anvil 11 are hydraulically actuated.
- the Fig. 3 shows the head 16 of a hydraulic fine blanking press, not shown.
- a receiving space 17 formed as a core body 18 ring-shaped cylinder 19 with a US underside of the head piece 16 facing hole bottom 20, one of the top OS of the head piece 16 facing tubular neck 21 and a hole bottom 20th associated flange 22 is arranged.
- FIG. 4 shows in the butt joint a stripping / ejection cylinder 25 placed coaxially to the lifting axis HU, which closes the formed in the core body 18 serrated cylinder chamber 26 pressure-tight by screwing.
- the stripping / ejection cylinder 26 and the core body 18 are secured against rotation by means of groove pieces 27 on the head piece 16.
- a cylinder space 28 is formed, which is closed by a pressure-tight screwed lid 29 and a double-acting stripping / ejection piston 30 receives.
- the stripping / ejection piston 30 divides the cylinder chamber 28 into a first pressure chamber 31a associated with one side of the stripping / ejection piston 30 and a second pressure chamber 31b associated with the other side of the stripping / ejection piston 30.
- the cover 29 has in the middle a supply opening 32 for the connection of a hydraulic line 33 of the hydraulic system 34 for acting on the first pressure chamber 31a with hydraulic fluid.
- the second pressure chamber 31 b is parallel to and in the wall region 35 of the stripping / ejection cylinder 25 connected perpendicular to the lifting axis HU formed channel 36 and the hydraulic line 33a to the hydraulic system 34 for acting on hydraulic fluid predetermined pressure (see Fig. 4 ).
- the stripping / ejection piston 30 is connected to a piston rod 37 which is guided on the lifting axis HU by a ring-toothed piston 38 guided in the serrated cylinder chamber 26 and carries an ejection plate 39 which rests on the perforated bottom 20 of the core body 18.
- the serrated piston 38 in the serrated cylinder chamber 26 is associated with a pressure chamber 40 which is connected by a further in the wall portion 35 of the stripping / ejection cylinder 25 arranged channel 41 via the hydraulic line 33b with the hydraulic system 34 (see Fig. 5 ).
- the annular serrated piston 38 associated annular toothed pin 43 and pressure pin 44 are guided in alignment with the lifting axis HU vertically displaceable.
- the support body 47 has coaxial to the lifting axis HU through holes 48 for the pressure pin 44.
- In the support plate 49 there are through holes 51, in which pressure pins 52a and 52b are guided, wherein the pressure pin 52a are assigned to the driven through the support body 47 pressure pin 44 and the pressure pin 52b the serration 43.
- the pressure pins 52a and 52b, the piston plate 45, the pressure pins 44, the serration pins 93, the ejection plate 39, the piston rod 37, the stripping / ejection piston 30 and the serrated piston 38 move synchronously upwards, ie in the direction of the head piece 4.
- the hydraulic fluid in the pressure chamber 40 of the serrated piston 38 and in the pressure chamber 31 a of the stripping / ejection piston 30 is displaced.
- the stripping / ejection piston 30 is activated and the stripping process begins, ie the working space 31a is pressurized by hydraulic fluid.
- the stripping / ejection piston 30 presses the ejection plate 39 and thus all the pressure pins 52a, 52b, serration pins 93 and 44 and the piston plate 45 synchronously downwards, ie in the direction of foot 53.
- the said pressure pin press on the pressure pin not shown in the tool, the strip the punched grid from the cutting punch or eject the inner molding.
- the serrated piston 38 is tracked by pressurizing the working chamber 40 with hydraulic fluid in parallel or with a time delay and at a lower speed the stripping / ejection piston 30.
- the Fig. 6 shows the foot piece 53 in a sectional view.
- a master cylinder space 54 is formed, whose axis HA lies on the lifting axis HU of the fineblanking press and accommodates the double-acting main piston 55.
- the main piston 55 has a cylindrical shaft 56 which discusscale perpendicular from its axis HA projecting work surfaces 57 a and 57 b, which divide the master cylinder chamber 58 into two pressure chambers 59 a and 59 b with low lifting height, so that the foot 53 a low construction height has.
- the pressure chambers 59a and 59b are each connected to the hydraulic system 34 through a port 60a and 60b via respective ports and hydraulic lines 61.
- the master cylinder space 58 and thus the pressure chamber 59a is pressure-tightly sealed by a cover 62.
- the main piston 55 performs a corresponding stroke movement between top dead center OT and bottom dead center UT.
- a Jacobhaltezylinderraum 63 is formed, in which a counter-holding piston 64 and an ejector piston 65 is received, which is guided with its piston rod 66 centrally through the counter-holding piston 64 and ends with the ejection plate 39 in a pressure chamber 68 for the piston rod 66.
- the counter-holding piston 64 divides a pressure chamber 69 in the cylinder chamber 63 of the main piston 55.
- the pressure chamber 68 for the ejector piston 65 and the pressure chamber 69 for the counter-holding piston 64 are formed by in the shaft 56 perpendicular to the axis HA introduced separate channels 70a and 70b formed in the shaft 56 Verteil VogelsEnglishept 71 and channels 72a and 72b in the foot 53 with the hydraulic line 33 of the Hydraulic system 34 connected.
- FIG. 7 is taken to the arrangement and attachment of the table top 73 on the main piston 55 reference.
- the table top 73 rests with its underside on impact on the shaft 56 of the main piston 55 and has a projecting cylindrically shaped bottom portion 74 whose diameter is matched to the diameter of the shaft 56 of the main piston 55.
- the bottom portion 74 of the table top 73 is coaxial with the Hubachse HU arranged holes 75 provided.
- Counterhold pins 76 are guided in the bores 75 and are supported on a piston plate 78 which is arranged in a recess 77 above the bottom region 74 and which encloses a centrally arranged, cylindrical disk-shaped support body 79.
- the support body 79 has coaxial with the lifting axis HU through holes 80 for pressure pin 81, which are passed through the holes 80 of the support body 79.
- a support plate 82 in a relation to the recess 77 stepwise outwardly offset recess 83, wherein the support plate 82 is arranged plane-parallel to the piston plate 78.
- In the support plate 82 are through holes 84a and 84b, wherein in the through holes 84a thrust pins 85 are guided, which are assigned to the counter-holding pin 76 and the through-holes 84b passed through the support body 79 pressure pin 81.
- the pressure pins 81 and 85, the piston plate 78, the counter-holding pins 76, the ejection plate 39, the piston rod 66, the ejector piston 65 and the counter-retaining piston 64 move synchronously down during the cutting process.
- the hydraulic fluid in the pressure chamber 68 of the ejector piston 65 and in the pressure chamber 69 of the counter-holding piston 64 is displaced.
- the ejector piston 65 is activated and the ejection process of the cutting part cut into the cutting plate begins, ie the pressure chamber 68 is pressurized with hydraulic fluid.
- the Auswerfplatte 39 pushes all the pressure pins 76, 81 and 85 and the piston plate 78 synchronously upward.
- the mentioned pressure pins 81 and 85 do not press on shown pressure pin in the tool that eject the cutting part from the cutting opening of the cutting plate in the tool room.
- the counter-piston 64 is tracked by pressurization of the pressure chamber 69 with hydraulic fluid in parallel or with a time delay and at a lower speed.
- the course of the method according to the invention is based on the Fig. 8 described that shows the circuit of the pressure chambers 31a and 31b of the stripping / ejection piston 30 with the pressure chamber 68 of the ejector piston 65 and the pressure chamber 40 of the ring-toothed piston 38 with the pressure chamber 69 of the counter-holding piston 64 in the first hydraulic circuit 92 and second hydraulic circuit 93 extracts.
- the pressure chambers 31a and 31b of the stripping / ejection piston 30 and the pressure chamber 68 of the Auswerfkolbens 65 in the first hydraulic circuit 92 are supplied via a common high pressure accumulator 86 for hydraulic fluid, which is controlled by a central controller 87 logic cartridge valve 88, which with the hydraulic system 34th is connected via the hydraulic line 33 and is adjusted to a desired, to the stripping / ejection force F RA and the ejector force F GA adjusted pressure level.
- each a pressure transducer 91a and 91b in the hydraulic line 33 for Control of the 4/3-way proportional valves 89 and 90 is assigned by the central controller 87.
- the second hydraulic circuit 93 comprises at least one of the pressure chamber 40 of the ring-necked piston 38 and the pressure chamber 69 of the counter-holding piston 64 associated and the working pressure adjusting cartridge 94, at least one pressure transducer 95 for pressure detection in the second hydraulic circuit 93 and passing the pressure value to the central controller 87 for the control of the cartridge valve 94 and at least one hydraulic pump unit 96.
- the hydraulic pump unit 96 is assigned at least one installation valve 97 for setting the delivery rate, at least one pressure limiting valve 98 for limiting the pressure of the delivery flow and at least one pressure sensor 95 for pressure detection and transfer of the pressure values to the central controller 87 for actuating the installation valve 94.
- the pressure chambers 31a, 31b and 68 of the first hydraulic circuit 92 and the pressure chambers 40 and 69 of the second hydraulic circuit thus constitute separate control circuits which are separated as a function of the plunger position by the central control via the cartridge valve 88 and the 4/3-way proportional valves 89th and 90, on the one hand, and the cartridge valve 94 and the hydraulic pump unit 96, on the other hand.
- the hydraulic circuit 92 can also feed the pressure chamber 90 from the reservoir 86 and the hydraulic circuit 93 from the pump the pressure chamber 31a.
Abstract
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Abstreifen eines Stanzgitters, Ausstoßen eines Innenformteils und Auswerfen eines Schneidteils in einer Feinschneidpresse. Die Aufgabe der Erfindung besteht darin, eine Vorrichtung und ein Verfahren zum Abstreifen/Ausstoßen eines Stanzgitters und Auswerfen eines Schneidteils aus einem Werkzeug in einer Feinschneidpresse zu schaffen, mit denen die Abstreif-/ Ausstoßkraft und die Auswerfkraft unabhängig von der Ringzackenkraft und Gegenhaltekraft unter Reduzierung der Kolbenmasse des Ringzacken- und Gegenhaltekolbens, der Erhöhung der Abstreif-Ausstoß- und Auswerfgeschwindigkeit bei gleichzeitiger Vereinfachung der hydraulischen Schaltung einstellbar ist. Gelöst wird diese Aufgabe dadurch, dass der Ringzackenkolben (38) mit einem Abstreif-/Ausstoßkolben (30) und der Gegenhaltekolben (64) mit einem Auswerferkolben (65) jeweils im Kopf- und Fußstück (16,53) eine separate bauliche Einheit mit voneinander unabhängigen Druckräumen (31a,31b;68) für den Abstreif-/ Ausstoßkolben (30) einerseits und den Auswerferkolben (65) andererseits bilden, wobei die Druckräume (31a,31b;68) des Abstreif-/Ausstoßkolbens (30) und Auswerferkolbens (65) untereinander über einen ersten steuerbaren Hydraulikkreis (92) des Hydrauliksystems (34) und die Druckräume (40;69) des Ringzackenkolbens (38) und Gegenhaltekolbens (64) über einen zweiten steuerbaren Hydraulikkreis (93) in Verbindung stehen.The invention relates to an apparatus and a method for stripping a stamped grid, ejecting an inner molding and ejecting a cutting part in a fine blanking press. The object of the invention is to provide an apparatus and a method for stripping / ejecting a punched grid and ejecting a cutting part from a tool in a fine blanking press, with which the Abstreif- / ejection force and the Auswerfkraft regardless of the squeaking force and holding force while reducing the Piston mass of the serrated and counter-retaining piston, the increase of the stripping ejection and ejection speed is adjustable while simplifying the hydraulic circuit. This object is achieved in that the annular toothed piston (38) with a Abstreif- / ejection piston (30) and the counter-holding piston (64) with an ejector piston (65) in the head and foot piece (16,53) with a separate structural unit with each other form the pressure chambers (31a, 31b, 68) of the stripping / ejection piston (30) and ejector piston (65) ) communicate with each other via a first controllable hydraulic circuit (92) of the hydraulic system (34) and the pressure chambers (40; 69) of the serrated piston (38) and counter-holding piston (64) via a second controllable hydraulic circuit (93).
Description
Die Erfindung betrifft eine Vorrichtung zum Abstreifen eines Stanzgitters, Ausstoßen eines Innenformteils und Auswerfen eines Schneidteils in einer Feinschneidpresse, mit einem im Kopfstück angeordneten Ringzackenzylinder, in welchem ein über einen Druckraum mit Hydraulikfluid beaufschlagbarer Ringzackenkolben zum Erzeugen einer auf Ringzackenbolzen wirkenden Ringzackenkraft geführt ist, einem im Fußstück angeordneten Hauptzylinder, in dem über einen Druckraum mit Hydraulikfluid beaufschlagbarer, eine Hubbewegung in Richtung Hubachse ausführender und eine Tischplatte tragender Hauptkolben/Stößel mit einem auf Druckbolzen wirkenden Gegenhaltekolben zum Erzeugen einer Gegenkraft geführt ist und einem Hydrauliksystem zur Versorgen der im Kopf- und Fußstück angeordneten Druckräume mit dem auf einen vorgegebenen Arbeitsdruck durch eine zentrale Steuerung eingestellten Hydraulikfluid.The invention relates to a device for stripping a stamped grid, ejecting an inner molding and ejecting a cutting part in a fine blanking press, with a arranged in the top ring cylinder cylinder in which a pressure chamber with hydraulic fluid acted upon annular toothed piston for generating a force acting on a serrated annular tooth force is performed in the Base arranged master cylinder, in which via a pressure chamber with hydraulic fluid acted upon, a lifting movement in the direction Hubachse exporting and a table top carrying main piston / plunger is guided with a counter-pressure piston acting on counter-piston to generate a counterforce and a hydraulic system for Supplying the arranged in the top and bottom pressure chambers with the adjusted to a predetermined working pressure by a central control hydraulic fluid.
Die Erfindung betrifft weiterhin ein Verfahren zum Abstreifen eines Stanzgitters vom Schneidstempel, Ausstoßen einer Innenform und Auswerfen eines Schneidteils aus der Schneidplatte eines Werkzeugs in einer Feinschneidpresse mit einem im Fußstück angeordneten aufwärts bewegenden Hauptkolben, bei dem zunächst mit einem im Kopfstück der Presse angeordneten Ringzackenkolben eine über Ringzackenbolzen auf eine Führungs- bzw. Ringzackenplatte wirkende Ringzackenkraft zum Einpressen der Ringzacke in das Schneidmaterial und mit einem im Fußstück angeordneten Gegenhaltekolben eine dem Schneiden entgegen gerichtete Gegenhaltekraft erzeugt, sodann beim Schneiden das Hydraulikfluid aus den Druckräumen des Ringzacken- bzw. Gegenhaltekolbens bei einem einstellbaren Druck verdrängt und nach Beenden des Schneidens der Druckraum des Ringzackenkolbens im Kopfstück und der Druckraum des Gegenhaltekolbens im Fußstück mit einem auf einen vorgegebenen Arbeitsdruck eingestellten Hydraulikfluid aus einem Hydrauliksystem beaufschlagt und durch eine zentrale Steuerung auf eine vorgegebene, das Stanzgitter abstreifende und das Innenformteil ausstoßenden Abstreif-/Ausstoßkraft sowie das Schneidteil auswerfende Auswerfkraft eingestellt werden.The invention further relates to a method for stripping a punched grid from the cutting punch, ejecting an inner mold and ejecting a cutting part from the cutting plate of a tool in a fine blanking press with a arranged in the foot upwardly moving main piston, in the first with a arranged in the head of the press ring-toothed piston over Ringtooth pin acting on a leading or serrated plate ring tooth force for pressing the ring teeth in the cutting material and with a counter-piston arranged in the foot generates a counter-holding counter-holding force, then cutting the hydraulic fluid from the pressure chambers of the Ringzacken- or counter-holding piston at an adjustable pressure displaced and after completion of cutting the pressure chamber of the annular toothed piston in the head piece and the pressure chamber of the counter-holding piston in the foot piece with a hydraulic fluid adjusted to a predetermined working pressure d acted upon by a hydraulic system and by a central control to a predetermined, the punched grid stripping and the inner mold part ejecting stripping / ejection force and the cutting part ejecting ejection force can be adjusted.
Das Feinschneiden und sein Verfahrensablauf sind hinlänglich bekannt. Die kennzeichnenden Verfahrensmerkmale sind der Werkzeugaufbau, die Ringzacke, der Schneidspalt und die wirkenden Kräfte. Das Feinschneidwerkzeug umfasst ein Oberteil und Unterteil. Zum Oberteil gehört mindestens eine Führungs- bzw. Ringzackenplatte, die über Druckbolzen mit einer von einem Ringzackenkolben einer Feinschneidpresse erzeugten Ringzackenkraft beaufschlagt wird, ein in der Führungs- bzw. Ringzackenplatte geführter Schneidstempel zum Ausschneiden eines Schneidteils aus dem Schneidmaterial und ein Ausstoßer zum Ausstoßen eines Innenformteils aus dem Schneidstempel. Das Unterteil enthält eine Schneidplatte oder Matrize, ein im Schneidstempel geführten Auswerfer, der über Druckbolzen mit einer von einem Gegenhaltekolben der Feinschneidpresse erzeugten dem Schneidstempel entgegenwirkenden Gegenkraft beaufschlagt wird. Das Schneidmaterial ist zwischen der Führungs- bzw. Ringzackenplatte und der Schneidplatte geklemmt. Zu Beginn des Schneidvorgangs wird die in der Führungs- bzw. Ringzackenplatte befindliche Ringzacke in das Schneidmaterial durch die Ringzackenkraft eingedrückt. Beim nachfolgenden Schneiden wird diese Kraft durch den hochfahrenden Hauptkolben verdrängt, die nach dem Schneidende das Stanzgitter vom Schneidstempel abstreift und die Innenform in den geöffneten Werkzeuginnenraum ausstößt. Mit Schneidbeginn drückt die vom Gegenhaltekolben erzeugte Gegenkraft gegen den Schneidstempel und wird durch die Schneidkraft überwunden. Nach Beendigung des Schneidvorgangs wirft diese Kraft das in die Schneidplatte eingedrückte Schneidteil in den Werkzeuginnenraum aus ("
Der Feinschneidvorgang erfordert spezielle dreifachwirkende Pressen, die grundsätzlich von unten nach oben arbeiten und eine kontrollierte Steuerung des Schneidvorgangs mit den Nebenfunktionen für die Ringzacke, Gegenhalter und Auswerfer ermöglichen. Die Ringzackenkraft und Gegenhaltekraft werden hydraulisch und die Schneidkraft mechanisch oder hydraulisch erzeugt.Fineblanking and its procedure are well known. The characteristic process features are the tool design, the ring point, the cutting gap and the acting forces. The fineblanking tool comprises an upper part and a lower part. The upper part includes at least one guide or ring plate plate, which is acted upon by pressure pins with a serrated piston of a fine cutting press Ringzackenkraft, guided in the guide or ring serrated cutting punch for cutting a cutting part of the cutting material and an ejector for ejecting an inner molding from the cutting punch. The lower part contains a cutting plate or die, an ejector guided in the cutting punch, which is acted upon by pressure pins with a counterforce produced by a counter-holding piston of the fineblanking press and counteracting the cutting punch. The cutting material is clamped between the guide plate and the cutting plate. At the beginning of the cutting operation located in the leadership or ring serrated annular teeth in the cutting material is pressed by the ring-tooth force. During subsequent cutting, this force is displaced by the high-speed main piston, which strips the punched grid from the cutting punch after the end of the cutting and ejects the inner mold into the opened tool cavity. With the start of cutting, the counterforce generated by the counter-holding piston presses against the cutting punch and is overcome by the cutting force. After completion of the cutting process, this force throws the pressed into the insert cutting part in the tool room ("
The fineblanking process requires special triple-acting presses, which basically work from the bottom up and a controlled control of the cutting process with the Enable auxiliary functions for the ring point, counterholder and ejector. The ring-tooth force and counter-holding force are generated hydraulically and the cutting force is generated mechanically or hydraulically.
Es gibt eine Vielzahl von Kolbenanordnungen, die in Pressen zum Antrieb oder Druckbeaufschlagung eingesetzt werden.
Aus der
In der
Beim Stand der Technik nach
Des Weiteren ist aus der
Aus der
Bei allen diesen bekannten Lösungen fungiert der Ringzackenkolben als das Abstreifen/Ausstoßen-Element und der Gegenhaltekolben als das Auswerfen des Schneidteils initiierendes Element, die das Abstreifen/Ausstoßen und Auswerfen bei gleicher Wirkfläche wie beim Verdrängen des Ringzackenkolbens/Gegenhaltekolbens durchführen. Dies bedeutet, dass das Abstreifen/Ausstoßen und Auswerfen mit einem Kolben großer Masse erfolgt, wodurch beim Auffahren der Kolben am Endanschlag hohe Kräfte auftreten, die zu unerwünschten Schlägen führen. Außerdem werden für große Ausstoßgeschwindigkeiten sehr große Ölmengen benötigt, die insbesondere bei Direktantrieben große Pumpen erfordern.There are a variety of piston assemblies that are used in presses for driving or pressurizing.
From the
In the
According to the state of the art
Furthermore, from the
From the
In all these known solutions, the serrated piston acts as the stripping / ejecting element and the Containment piston as the ejection of the cutting part initiating element that perform the stripping / ejecting and ejecting the same effective area as when displacing the ring-jaw piston / counter-holding piston. This means that the stripping / ejecting and ejecting takes place with a piston of large mass, whereby high forces occur when approaching the piston at the end stop, which lead to undesirable impacts. In addition, very large volumes of oil are required for high output speeds, which require large pumps especially for direct drives.
Ferner ist in der
Mit dieser bekannten Lösung ist es zwar möglich, die Abstreifer- und Auswerferkraft gegenüber der Ringzackengesamtkraft zu variieren, jedoch bleibt die Volumenverdrängung vom Ringzackenkolben abhängig, so dass eine von der Ringzackenkraft bzw. Gegenhaltekraft unabhängige Anpassung der Abstreif-/Ausstoßkraft und Auswerferkraft an den realen Kraftbedarf nicht möglich ist. Außerdem muss die Kraft im Ringzackenzylinder und Gegenhaltezylinder immer gleich groß oder größer als die Ausstoß-/Auswerferkraft sein, wodurch die Einsatzmöglichkeiten eingeschränkt sind. Die hydraulische Schaltung ist durch die Steuerung innerhalb des Ringzackenkolbens kompliziert und aufwändig.Furthermore, in the
Although it is possible with this known solution to vary the wiper and ejector force relative to the overall ring-serrated force, the volume displacement remains dependent on the serrated piston, so that one of the ring-tooth force or counter-holding force is independent Adaptation of the stripping / ejection force and ejector force to the real power requirement is not possible. In addition, the force in the ring-jaw cylinder and counter-holding cylinder must always be equal to or greater than the ejection / Auswerferkraft, whereby the applications are limited. The hydraulic circuit is complicated and expensive by the control within the ring-shaped piston.
Bei diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum Abstreifen/Ausstoßen eines Stanzgitters bzw. Innenformteils und Auswerfen eines Schneidteils aus einem Werkzeug in einer Feinschneidpresse zu schaffen, mit denen die Abstreif-/ Ausstoßkraft und die Auswerfkraft unabhängig von der Ringzackenkraft und Gegenhaltekraft unter Reduzierung der Kolbenmasse des Ringzacken- und Gegenhaltekolbens, der Erhöhung der Abstreif-/Ausstoß- und Auswerfgeschwindigkeit bei gleichzeitiger Vereinfachung der hydraulischen Schaltung einstellbar ist.In this prior art, the present invention seeks to provide an apparatus and a method for stripping / ejecting a stamped grid or inner molding and ejecting a cutting part from a tool in a fine blanking press, with which the stripping / ejection force and the ejection force independently from the ring-jaw force and counter-holding force with reduction of the piston mass of the serrated and counter-holding piston, the increase of the stripping / ejection and ejection speed while simultaneously simplifying the hydraulic circuit is adjustable.
Diese Aufgabe wird durch eine Vorrichtung der eingangs genannten Art mit den Merkmalen des Anspruches 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 11 gelöst.This object is achieved by a device of the type mentioned above with the features of
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung und des erfindungsgemäßen Verfahrens sind den Unteransprüchen entnehmbar.Advantageous embodiments of the device according to the invention and of the method according to the invention can be taken from the subclaims.
Die erfindungsgemäße Lösung geht von der Erkenntnis aus, das Abstreifen des Stanzgitters, das Ausstoßen des Innenformteils und das Auswerfen des Schneidteils separat und unabhängig von der Funktion des Ringzacken- und Gegenhaltekolbens durchzuführen.
Dies wird dadurch erreicht, dass der Ringzackenkolben mit einem Abstreif-/Ausstoßkolben und der Gegenhaltekolben mit einem Auswerferkolben jeweils im Kopf- und Fußstück eine vom Ringzackenkolben bzw. Gegenhaltekolben separate bauliche Einheit mit voneinander unabhängigen Druckräumen für den Abstreif-/Ausstoßkolben einerseits und den Auswerferkolben andererseits bilden, wobei die Druckräume des Abstreif-/ Ausstoßkolbens und Auswerferkolbens untereinander über einen ersten steuerbaren Hydraulikkreis des Hydrauliksystems und die Druckräume des Ringzackenkolbens und Gegenhaltekolbens über einen zweiten steuerbaren Hydraulikkreis in Verbindung stehen.The solution according to the invention is based on Recognition of performing the stripping of the punched grid, the ejection of the inner mold part and the ejection of the cutting part separately and independently of the function of the Ringzacken- and counter-holding piston.
This is achieved in that the annular toothed piston with a stripping / ejection piston and the counter-holding piston with an ejector each in the head and foot piece of a separate annular piston or counter-piston structural unit with independent pressure chambers for the stripping / ejection piston on the one hand and the ejector piston on the other form, wherein the pressure chambers of the stripping / ejection piston and Auswerferkolbens communicate with each other via a first controllable hydraulic circuit of the hydraulic system and the pressure chambers of the ring-toothed piston and counter-holding piston via a second controllable hydraulic circuit.
Eine weitere bevorzugten Ausgestaltung der erfindungsgemäßen Vorrichtung sieht vor, dass der Abstreif-/ Ausstoßkolben in einem vom Ringzacken-Zylinder separierten Abstreif-/Ausstoßzylinder angeordnet ist, welcher am Ringzacken-Zylinder kopfseitig in Richtung Hubachse druckdicht und kraftschlüssig befestigt ist, wobei eine Kolbenstange des Abstreif-/Ausstoßkolbens den im Ringzacken-Zylinder geführten Ringzackenkolben mittig durchdringt und an einer dem Ringzackenkolben fußseitig zugeordneten Ausstoßplatte so fixiert ist, dass Abstreif-/Ausstoßkolben und Ringzackenkolben unabhängig voneinander eine Hubbewegung ausführen können.
Dies gewährleistet, dass beide Kolben von einander unabhängig gefahren und hydraulisch angesteuert werden können. Die Aufteilung in einen Abstreifkolben und einen Ringzackenkolben ermöglicht es außerdem, die für das Abstreifen/Ausstoßen und das Verdrängen benötigten Flächen voneinander zu trennen und die Flächen entsprechend dem tatsächlich erforderlichen Kraftbedarf anzupassen.
Zweckmäßigerweise sind die Ringzackenbolzen koaxial zur Hubachse im Ringzackenzylinder angeordnet und stützen sich an einer Ringzacken-Kolbenplatte zum Bewegen der Ringzacke ab, wobei die Ringzacken-Kolbenplatte einen Abstützkörper umschließt, der Durchgangsbohrungen aufweist, in welchen die Druckbolzen zum Abstreifen vertikal beweglich angeordnet sind.A further preferred embodiment of the device according to the invention provides that the stripping / ejection piston is arranged in a stripping / ejection cylinder separated from the serrated cylinder, which is fastened pressure-tightly and non-positively on the serrated cylinder in the direction of the stroke axis, a piston rod of the stripping - / ejection piston passes through the guided in the serrated cylinder ring-serrated piston center and is fixed to a ring-toothed piston foot-side associated ejection plate so that stripping / ejection piston and serrated piston independently can perform a lifting movement.
This ensures that both pistons can be driven independently of each other and hydraulically controlled. The division into a stripping piston and a serrated piston It also makes it possible to separate the surfaces required for stripping / ejection and displacement and to adjust the surfaces according to the actual force required.
Conveniently, the serrated pins are arranged coaxially to the stroke axis in the ring-jaw cylinder and are supported on a serrated piston plate for moving the ring spike, wherein the serrated piston plate surrounds a support body having through holes in which the pressure bolts are arranged to move vertically movable.
Der Abstreif-/Austoßkolben kann nach einer weiteren bevorzugten Ausgestaltung der Vorrichtung doppelt wirkend ausgebildet sein, dem ein erster und zweiter Druckraum im Abstreif-/Ausstoßzylinder zugeordnet ist.The stripping / ejection piston can be designed to be double acting according to a further preferred embodiment of the device, which is associated with a first and second pressure chamber in the stripping / ejection cylinder.
In weiterer bevorzugter Ausgestaltung der erfindungsgemäßen Vorrichtung ist der Abstreif-/ Ausstoßzylinder mit einem Deckel druckdicht verschlossen, durch den eine mit dem Hydrauliksystem verbundene Hydraulikleitung zur Beaufschlagung des ersten Druckraums mit Hydraulikfluid vorgegebenen Druckes aus dem ersten Hydraulikkreis geführt ist.In a further preferred embodiment of the device according to the invention, the stripping / ejection cylinder is pressure-tightly closed by a cover connected to the hydraulic system hydraulic line for pressurizing the first pressure chamber with predetermined pressure from the first hydraulic circuit.
Von Vorteil ist auch, dass der Abstreif-/ Ausstoßzylinder in seinem Wandbereich mit einem parallel und senkrecht zur Hubachse verlaufenden Kanal zum Beaufschlagen des zweiten Druckraumes mit Hydraulikfluid vorgegebenen Drucks aus dem ersten Hydraulikkreis des Hydrauliksystems versehen ist.
Damit ist gewährleistet, dass der Zylinderraum des Abstreif-/ Ausstoßzylinders und der Ringzacken-Zylinderraum jeweils separat voneinander mit Fluid entsprechend angepassten Druckes beaufschlagt werden können. Alle diese Merkmale stellen außerdem sicher, dass der Abstreif-Ausstoßzylinder mit dem Ringzackenzylinder bzw. Gegenhaltezylinder eine kompakte Einheit bildet und an das Hydrauliksystem problemlos und einfach angeschlossen werden kann.It is also advantageous that the stripping / ejection cylinder is provided in its wall region with a parallel and perpendicular to the stroke axis extending channel for applying the second pressure chamber with hydraulic fluid predetermined pressure from the first hydraulic circuit of the hydraulic system.
This ensures that the cylinder space of the stripping / Ejecting cylinder and the serrated cylinder chamber each separately from each other with fluid can be acted upon correspondingly adapted pressure. All of these features also ensure that the scraper-discharge cylinder forms a compact unit with the ring-jaw cylinder or counter-holding cylinder and can be easily and simply connected to the hydraulic system.
Nach einer bevorzugten weiteren Ausführungsform der Erfindung ist weiterhin vorgesehen, dass im Hauptkolben ein Gegenhaltezylinderraum für den Gegenhaltekolben ausgebildet ist, in dem ein axial in Hubrichtung verschiebbarer Auswerferkolben angeordnet ist, dessen Kolbenstange den Gegenhaltekolben mittig durchdringt und in den separaten Druckraum führt, der durch einen im Hauptkolben senkrecht zur Hubachse liegenden Kanal mit dem ersten Hydraulikkreis des Hydrauliksystems zum Beaufschlagen mit Hydraulikfluid vorgegebenen Drucks verbunden ist, wobei Auswerferkolben und Gegenhaltekolben unabhängig voneinander eine Hubbewegung ausführen können.According to a preferred further embodiment of the invention it is further provided that in the main piston a Gegenhaltezylinderraum is formed for the counter-holding piston in which an axially displaceable in the stroke direction ejector piston is arranged, the piston rod penetrates the counter-holding piston in the middle and leads into the separate pressure chamber, by a in Main piston is perpendicular to the stroke axis lying channel with the first hydraulic circuit of the hydraulic system for applying hydraulic fluid predetermined pressure is connected, wherein ejector piston and counter-holding piston can independently perform a lifting movement.
In einer weiteren Ausgestaltungsform der Erfindung ist der Hauptkolben mit einem parallel und senkrecht zur Hubachse verlaufenden Kanal zum Beaufschlagen des Druckraums des Gegenhaltekolbens mit Hydraulikfluid vorgegebenen Drucks aus dem zweiten Hydraulikkreis des Hydrauliksystems versehen.
Nach einer weiteren bevorzugten Ausgestaltung der Erfindung sind in das Fußstück Kanäle zum Zuführen von Hydraulikfluid vorgegebenen Drucks aus dem Hydrauliksystem eingebracht, so dass jeder Druckraum separat entsprechend den geforderten Drücken beaufschlagt werden kann, wodurch sichergestellt ist, dass der Auswerferkolben und der Gegenhaltekolben voneinander unabhängig ansteuerbar ist.In a further embodiment of the invention, the main piston is provided with a parallel and perpendicular to the Hubachse extending channel for acting on the pressure chamber of the counter-holding piston with hydraulic fluid predetermined pressure from the second hydraulic circuit of the hydraulic system.
According to a further preferred embodiment of the invention, channels for supplying hydraulic fluid predetermined pressure from the hydraulic system are introduced into the foot piece, so that each pressure chamber can be applied separately according to the required pressures, thereby ensuring is that the ejector piston and the counter-holding piston can be controlled independently of each other.
In weiterer zweckmäßiger Ausgestaltung der Erfindung umfasst der erste Hydraulikkreis einen vom Hydrauliksystem durch ein Einbauventil auf Arbeitsdruck von Abstreif-/Ausstoßkolben und Auswerferkolben eingestellten Hochdruckspeicher für die Druckräume, mindestens ein für jeden Druckraum von Abstreif-/Ausstoßkolben und Auswerferkolben zugeordnetes 4/3-Wege-Proportionalventil zum Zu- und Abschalten der Druckräume, wobei dem Proportionalventil ein Druckaufnehmer und dem Proportionalventil ein Druckaufnehmer für die Ansteuerung des Einbauventils zugeordnet sind.In a further expedient embodiment of the invention, the first hydraulic circuit comprises a high-pressure accumulator for the pressure chambers, which is set by the hydraulic system by a cartridge valve to the working pressure of the stripping / ejection piston and the ejector piston, at least one 4/3-way valve assigned to each pressure chamber by the stripping / ejection piston and ejector piston. Proportional valve for switching on and off of the pressure chambers, the proportional valve, a pressure transducer and the proportional valve, a pressure sensor for the control of the cartridge valve are assigned.
Von wesentlicher Bedeutung für eine unabhängige Steuerung der beiden Hydraulikkreise ist es, dass der zweite Hydraulikkreis mindestens ein die beiden Druckräume von Ringzacken- und Gegenhaltekolben verbindendes und den Arbeitsdruck einstellendes Einbauventil, mindestens einen Druckaufnehmer für die Ansteuerung des Einbauventils und mindestens eine Hydraulikpumpen-Einheit umfasst, der mindestens ein Einbauventil zum Einstellen der Fördermenge, mindestens ein Druckaufnehmer für die Ansteuerung des Einbauventils und mindestens ein Druckbegrenzungsventil zur Druckbegrenzung und Haltung des Förderstromes zugeordnet ist. Der zweite Hydraulikkreis arbeitet somit autark und unabhängig vom ersten Hydraulikkreis, dessen Einbauventile über die Druckaufnehmer von der zentralen Steuerung angesteuert werden.It is of essential importance for an independent control of the two hydraulic circuits that the second hydraulic circuit comprises at least one plug-in valve connecting the two pressure chambers of serrated and counter-holding pistons and adjusting the working pressure, at least one pressure sensor for actuating the cartridge valve and at least one hydraulic pump unit, the at least one cartridge valve for adjusting the delivery rate, at least one pressure sensor for controlling the cartridge valve and at least one pressure relief valve for pressure limiting and maintaining the delivery flow is assigned. The second hydraulic circuit thus operates independently and independently of the first hydraulic circuit, the cartridge valves are controlled via the pressure transducer from the central control.
Die Aufgabe wird weiterhin durch ein Verfahren dadurch gelöst, dass die Abstreif-/Ausstoßkraft und die Ringzackenkraft sowie die Auswerferkraft und Gegenhaltekraft in voneinander getrennten Druckräumen mit entsprechend an das Abstreifen/Ausstoßen und Auswerfen angepassten Wirkflächen erzeugt werden, wobei die Druckräume für die Abstreif-/ Ausstoßkraft und die Druckräume für die Ringzacken- und Gegenhaltekraft mit Hydraulikfluid voreingestellten Druckes aus von der zentralen Steuerung in separaten Hydraulikkreisen des Hydrauliksystems so angesteuert werden, dass Ringzackenkolben und Gegenhaltekolben den Abstreifer-/ Ausstoßkolben bzw. Auswerfkolben beim Abstreifen bzw. Auswerfendem nacheilen.The object is further achieved by a method in that the stripping / ejection force and the ring-tooth force and the Auswerferkraft and counter-holding force are generated in separate pressure chambers with correspondingly adapted to the stripping / ejection and ejection active surfaces, the pressure chambers for the stripping / Ejection force and the pressure chambers for the serration and counter-holding force with hydraulic fluid preset pressure from the central control in separate hydraulic circuits of the hydraulic system are controlled so that ring-toothed piston and counter-retaining piston the scraper / ejection piston or Auswerfkolben when stripping or Auswerfendem lag.
Von besonderem Vorteil ist, dass die Wirkflächen in den Druckräumen für das Abstreifen/Ausstoßen und Auswerfen gleich oder unterschiedlich groß gewählt werden können, so dass die Höhe der Abstreif-/Ausstoßkraft und der Auswerferkraft unabhängig von der Größe der Ringzacken- und Gegenhaltekraft einstellbar ist.It is particularly advantageous that the active surfaces in the pressure chambers for stripping / ejection and ejection can be chosen to be the same or different sizes, so that the height of the stripping / ejection force and the ejector force can be set independently of the size of the serrated and counter-holding force.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen.Further advantages and details will become apparent from the following description with reference to the accompanying drawings.
Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.
Es zeigen
-
Fig. 1 eine schematische Darstellung des Feinschneidvorgangs nach dem Stand der Technik, -
Fig. 2 eine schematische Darstellung des Abstreif-/ Ausstoß- und Auswerfvorgangs beim Feinschneiden nach dem Stand der Technik, -
Fig. 3 einen Schnitt des Kopfstücks mit Ringzackenzylinder und Abstreif-/Ausstoßzylinder, -
Fig. 3 einen Schnitt des Kopfstückes der Presse, -
Fig. 4 einen Schnitt des Abstreif-/Ausstoßzylinder mit Ringzackenzylinder, -
Fig. 5 einen Schnitt des Abstreif-/ Ausstoßzylinders mit Darstellung des Kanals für den Druckraum des Ringzackenzylinders, -
Fig. 6 einen Schnitt des Fußstückes der Presse mit Tischplatte, -
Fig. 7 einen Schnitt des Hauptkolbens mit Tischplatte und -
Fig. 8 eine schematische Darstellung des Ablaufs des erfindungsgemäßen Verfahrens.
-
Fig. 1 a schematic representation of the fine blanking process according to the prior art, -
Fig. 2 a schematic representation of the stripping / ejection and ejection process in fine cutting according to the prior art, -
Fig. 3 a section of the head piece with ring-shaped cylinder and stripping / ejection cylinder, -
Fig. 3 a section of the head piece of the press, -
Fig. 4 a section of the stripping / ejection cylinder with ring-shaped cylinder, -
Fig. 5 a section of the stripping / ejection cylinder showing the channel for the pressure chamber of the ring-shaped cylinder, -
Fig. 6 a section of the foot piece of the press with table top, -
Fig. 7 a section of the main piston with table top and -
Fig. 8 a schematic representation of the sequence of the method according to the invention.
Die
In der
Die Gegenkraft FG wirkt bei Schneidbeginn sofort entgegen dem Schneidstempel 10 und wird durch die Schneidkraft FS überwunden. Ist der Schneidvorgang beendet, wirft die Auswerferkraft FGA das Schneidteil 1 aus der Schneidöffnung der Schneidplatte 5 aus.
Die Druckbolzen 8 für die Führungs- bzw. Ringzackenplatte 6 und die Druckbolzen 12 für den Gegenhalter 11 werden hydraulisch betätigt.In the
The counterforce F G acts at the beginning of cutting immediately opposite the cutting
The pressure pin 8 for the lead or ring serrated plate. 6 and the pressure pins 12 for the
Die
Am rohrförmigen Hals 21 des Kernkörpers 18 ist stirnseitig -wie
Der Abstreif-/Ausstoßkolben 30 unterteilt den Zylinderraum 28 in einen ersten, der einen Seite des Abstreif-/Ausstoßkolbens 30 zugeordneten Druckraum 31a und einen zweiten der anderen Seite des Abstreif-/Ausstoßkolbens 30 zugeordneten Druckraum 31b. Der Deckel 29 hat mittig eine Zuleitungsöffnung 32 für den Anschluss einer Hydraulikleitung 33 des Hydrauliksystems 34 zur Beaufschlagung des ersten Druckraum 31a mit Hydraulikfluid. Der zweite Druckraum 31b ist über einen im Wandbereich 35 des Abstreif-/Ausstoßzylinders 25 parallel und senkrecht zur der Hubachse HU ausgebildeten Kanal 36 und der Hydraulikleitung 33a an das Hydrauliksystem 34 zum Beaufschlagen mit Hydraulikfluid vorgegebenen Drucks angeschlossen (siehe
Der Abstreif-/Ausstoßkolben 30 ist mit einer Kolbenstange 37 verbunden, die auf der Hubachse HU durch einen im Ringzacken-Zylinderraum 26 geführten Ringzackenkolben 38 hindurchgeführt ist und eine Ausstoßplatte 39 trägt, welche auf dem Lochboden 20 des Kernkörpers 18 auflagert.
Dem Ringzackenkolben 38 im Ringzacken-Zylinderraum 26 ist ein Druckraum 40 zugeordnet, welcher durch einen weiteren im Wandbereich 35 des Abstreif-/Ausstoßzylinders 25 angeordneten Kanal 41 über die Hydraulikleitung 33b mit dem Hydrauliksystem 34 verbunden ist (siehe
In den Bohrungen 42 des Lochbodens 20 sind dem Ringzackenkolben 38 zugeordnete Ringzackenbolzen 43 und Druckbolzen 44 in Flucht der Hubachse HU vertikal verschiebbar geführt. Unmittelbar unterhalb des Lochbodens 20 liegt planparallel eine Kolbenplatte 45 in einer Ausnehmung 46 des Kernkörpers 18 ein, die einen zentrisch angeordneten, zylinderscheibenförmigen Abstützkörper 47 umschließt. Der Abstützkörper 47 hat koaxial zur Hubachse HU gelegene Durchgangsbohrungen 48 für die Druckbolzen 44. Unterhalb der Kolbenplatte 45 befindet sich eine Abstützplatte 49 in einer gegenüber der Ausnehmung 46 stufenartig nach außen versetzten weiteren Ausnehmung 50, wobei die Abstützplatte 49 planparallel zur Kolbenplatte 45 angeordnet ist.
In der Abstützplatte 49 befinden sich Durchgangsbohrungen 51, in denen Druckbolzen 52a und 52b geführt sind, wobei die Druckbolzen 52a den durch den Abstützkörper 47 hindurchgeführten Druckbolzen 44 und die Druckbolzen 52b den Ringzackenbolzen 43 zugeordnet sind.
Beim Schneidvorgang bewegen sich die Druckbolzen 52a und 52b, die Kolbenplatte 45, die Druckbolzen 44, die Ringzackenbolzen 93, die Ausstoßplatte 39, die Kolbenstange 37, der Abstreif-/ Ausstoßkolben 30 und der Ringzackenkolben 38 synchron nach oben, d.h. in Richtung Kopfstück 4. Das Hydraulikfluid im Druckraum 40 des Ringzackenkolbens 38 und im Druckraum 31a des Abstreif-/ Ausstoßkolbens 30 wird verdrängt.
Sobald der Hauptkolben/Stößel 55 den oberen Totpunkt OT erreicht, wird der Abstreif-/Ausstoßkolben 30 aktiviert und der Abstreifvorgang beginnt, d.h. der Arbeitsraum 31a wird durch Hydraulikfluid druckbeaufschlagt. Der Abstreif-/ Ausstoßkolben 30 drückt die Ausstoßplatte 39 und damit alle Druckbolzen 52a, 52b, Ringzackenbolzen 93 und 44 sowie die Kolbenplatte 45 synchron nach unten, d.h. in Richtung Fußstück 53. Die genannten Druckbolzen drücken auf die nicht weiter dargestellten Druckbolzen im Werkzeug, die das Stanzgitter von dem Schneidstempel abstreifen bzw. das Innenformteil ausstoßen.
Der Ringzackenkolben 38 wird durch Druckbeaufschlagung des Arbeitsraums 40 mit Hydraulikfluid parallel oder zeitverzögert und mit geringerer Geschwindigkeit dem Abstreif-/Ausstoßkolben 30 nachgeführt.At the
The stripping /
The stripping /
The
In the
In the
During the cutting operation, the pressure pins 52a and 52b, the
As soon as the main piston /
The
Die
Je nach Beaufschlagung der Druckräume 59a und 59b mit Hydraulikfluid vorgegebenen Druckes führt der Hauptkolben 55 eine entsprechende Hubbewegung zwischen oberen Totpunkt OT und unteren Totpunkt UT aus.
Im Hauptkolben 55 ist ein Gegenhaltezylinderraum 63 ausgebildet, in dem ein Gegenhaltekolben 64 und ein Auswerferkolben 65 aufgenommen ist, welcher mit seiner Kolbenstange 66 mittig durch den Gegenhaltekolben 64 hindurchgeführt ist und mit der Ausstoßplatte 39 in einem Druckraum 68 für die Kolbenstange 66 endet. Der Gegenhaltekolben 64 teilt im Zylinderraum 63 des Hauptkolbens 55 einen Druckraum 69 ab.
Der Druckraum 68 für den Auswerferkolben 65 und der Druckraum 69 für den Gegenhaltekolben 64 sind durch im Schaft 56 senkrecht zur Achse HA eingebrachte separate Kanäle 70a und 70b über im Schaft 56 ausgebildete Verteilerausnehmungen 71 und Kanäle 72a und 72b im Fußstück 53 mit der Hydraulikleitung 33 des Hydrauliksystems 34 verbunden.The
Depending on the pressure applied to the
In the main piston 55 a
The
In
Der Bodenbereich 74 der Tischplatte 73 ist mit koaxial zur Hubachse HU angeordneten Bohrungen 75 versehen. In den Bohrungen 75 sind Gegenhaltebolzen 76 geführt, die sich an einer in einer Ausnehmung 77 oberhalb des Bodenbereichs 74 angeordneten Kolbenplatte 78 abstützen, welche einen zentrisch angeordneten, zylinderscheibenförmigen Abstützkörper 79 umschließt.
Der Abstützkörper 79 hat koaxial zur Hubachse HU gelegene Durchgangsbohrungen 80 für Druckbolzen 81, die durch die Bohrungen 80 des Abstützkörpers 79 hindurchgeführt sind. Oberhalb der Kolbenplatte 78 befindet sich eine Abstützplatte 82 in einer gegenüber der Ausnehmung 77 stufenartig nach außen versetzten Ausnehmung 83, wobei die Abstützplatte 82 planparallel zur Kolbenplatte 78 angeordnet ist.
In der Abstützplatte 82 befinden sich Durchgangsbohrungen 84a und 84b, wobei in den Durchgangsbohrungen 84a Druckbolzen 85 geführt sind, die den Gegenhaltebolzen 76 und den in den Durchgangsbohrungen 84b durch den Abstützkörper 79 hindurchgeführten Druckbolzen 81 zugeordnet sind.
Die Druckbolzen 81 und 85, die Kolbenplatte 78, die Gegenhaltebolzen 76, die Auswerfplatte 39, die Kolbenstange 66, der Auswerferkolben 65 und der Gegenhaltekolben 64 bewegen sich beim Schneidvorgangs synchron nach unten. Das Hydraulikfluid im Druckraum 68 des Auswerferkolbens 65 und im Druckraum 69 des Gegenhaltekolbens 64 wird verdrängt.
Sobald der Hauptkolben 55 beim Öffnen des Werkzeuges in der Abwärtsbewegung den Ausstoßschaltpunkt erreicht, wird der Auswerferkolben 65 aktiviert und der Auswerfvorgang des in die Schneidplatte eingeschnittenen Schneidteils beginnt, d.h. der Druckraum 68 wird mit Hydraulikfluid druckbeaufschlagt. Die Auswerfplatte 39 drückt alle Druckbolzen 76, 81 und 85 sowie die Kolbenplatte 78 synchron nach oben. Die genannten Druckbolzen 81 und 85 drücken auf die nicht weiter gezeigten Druckbolzen im Werkzeug, die das Schneidteil aus der Schneidöffnung der Schneidplatte in den Werkzeuginnenraum auswerfen.
Der Gegenhaltkolben 64 wird durch Druckbeaufschlagung des Druckraums 69 mit Hydraulikfluid parallel oder zeitverzögert und mit geringerer Geschwindigkeit nachgeführt.In
The
The
In the support plate 82 are through holes 84a and 84b, wherein in the through holes 84a thrust pins 85 are guided, which are assigned to the
The pressure pins 81 and 85, the
As soon as the
The
Der Ablauf des erfindungsgemäßen Verfahrens wird anhand der
Die Druckräume 31a und 31b des Abstreif-/ Ausstoßkolbens 30 und der Druckraum 68 des Auswerfkolbens 65 im ersten Hydraulikkreis 92 werden über einen gemeinsamen Hochdruckspeicher 86 für Hydraulikfluid versorgt, das über ein von einer zentralen Steuerung 87 angesteuertes logisches Einbauventil 88, welches mit dem Hydrauliksystem 34 über die Hydraulikleitung 33 verbunden ist und auf ein gewünschtes, an die Abstreif-/Ausstoßkraft FRA und die Auswerferkraft FGA angepasstes Druckniveau eingestellt wird. Die Einstellung und das Zu- und Abschalten der Druckräume 31a und 31b sowie des Druckraums 68 erfolgt über je ein in die jeweilige Hydraulikleitung 33 eingebundenes 4/3-Wege-Proportionalventil 89 und 90, dem je ein Druckaufnehmer 91a und 91b in der Hydraulikleitung 33 zur Ansteuerung der 4/3-Wege-Proportionalventile 89 und 90 durch die zentrale Steuerung 87 zugeordnet ist.The
Der zweite Hydraulikkreis 93 umfasst mindestens ein dem Druckraum 40 des Ringzackenkolbens 38 und dem Druckraum 69 des Gegenhaltekolbens 64 zugeordnetes und den Arbeitsdruck einstellendes Einbauventil 94, mindestens einen Druckaufnehmer 95 zur Druckdetektion im zweiten Hydraulikkreis 93 und Weitergabe des Druckwertes an die zentrale Steuerung 87 für die Ansteuerung des Einbauventils 94 und mindestens eine Hydraulikpumpeneinheit 96.' Der Hydraulikpumpeneinheit 96 ist mindestens ein Einbauventil 97 zum Einstellen der Fördermenge, mindestens ein Druckbegrenzungsventil 98 zur Druckbegrenzung des Förderstromes und mindestens ein Druckaufnehmer 95 zur Druckdetektion und Weitergabe der Druckwerte an die zentrale Steuerung 87 für die Ansteuerung des Einbauventils 94 zugeordnet.The second
Die Druckräume 31a, 31b und 68 des ersten Hydraulikkreises 92 und die Druckräume 40 und 69 des zweiten Hydraulikkreises stellen somit separate Regelkreise dar, die getrennt in Abhängigkeit der Stößellage durch die zentrale Steuerung über das Einbauventil 88 und die 4/3-Wege-Proportionalventile 89 und 90 einerseits und das Einbauventil 94 und der Hydraulikpumpeneinheit 96 andererseits eingestellt werden.
Mit dem erfindungsgemäßen Verfahren ist es damit möglich, die Abstreifer-/Ausstoßerkraft FRA und die Auswerferkraft FGA unabhängig vom Ringzackenkolben 38 und Gegenhaltekolben 64 zu steuern.
In einer anderen Variante kann der Hydraulikkreis 92 auch den Druckraum 90 aus dem Speicher 86 und der Hydraulikkreis 93 von der Pumpe den Druckraum 31a speisen.
With the method according to the invention, it is thus possible to control the wiper / ejector force F RA and the ejector force F GA independently of the
In another variant, the
Claims (12)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP15002020.4A EP3115122B1 (en) | 2015-07-06 | 2015-07-06 | Device and method for stripping/ejecting a stamping frame/internally moulded part and ejection of a cut part in a precision cutting press |
ES15002020.4T ES2665767T3 (en) | 2015-07-06 | 2015-07-06 | Equipment and procedure for removing / ejecting an internally formed stamping / part reticle and ejection of a cut piece in a precision cutting press |
KR1020160084651A KR102349809B1 (en) | 2015-07-06 | 2016-07-05 | Apparatus And Method For Stripping Away/Pushing Out A Punched Grid/Internally Formed Part And Ejecting A Blanked Part In A Precision Blanking Press |
CN201610525205.0A CN106334744B (en) | 2015-07-06 | 2016-07-05 | In fine press scraping punching grizzly bar, in ejection module and ejection punching component device and method |
JP2016133067A JP6931271B2 (en) | 2015-07-06 | 2016-07-05 | Equipment and methods for ejecting cut parts by detaching / removing the punched scrap / inner shape part in the precision punching press. |
US15/203,517 US10682782B2 (en) | 2015-07-06 | 2016-07-06 | Apparatus and method for stripping away/pushing out a punched grid/internally formed part and ejecting a blanked part in a precision blanking press |
Applications Claiming Priority (1)
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EP15002020.4A EP3115122B1 (en) | 2015-07-06 | 2015-07-06 | Device and method for stripping/ejecting a stamping frame/internally moulded part and ejection of a cut part in a precision cutting press |
Publications (2)
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EP3115122A1 true EP3115122A1 (en) | 2017-01-11 |
EP3115122B1 EP3115122B1 (en) | 2018-01-17 |
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US (1) | US10682782B2 (en) |
EP (1) | EP3115122B1 (en) |
JP (1) | JP6931271B2 (en) |
KR (1) | KR102349809B1 (en) |
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CN107598006A (en) * | 2017-10-24 | 2018-01-19 | 山西新环粉末冶金有限公司 | A kind of piston valve line forming press for possessing finished product collecting function |
CN114472671A (en) * | 2021-12-29 | 2022-05-13 | 宁波敏实汽车零部件技术研发有限公司 | Movable punching swallowing and discharging mechanism |
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JP6936128B2 (en) * | 2017-12-08 | 2021-09-15 | トヨタ自動車株式会社 | Cutting device and sheet material manufacturing method |
ES2944440T3 (en) * | 2019-04-18 | 2023-06-21 | Lapmaster Wolters Gmbh | Method for operating a fine die cutting system |
CN110695184B (en) * | 2019-10-25 | 2020-07-03 | 徐州瑞益晟机械有限公司 | Blanking die equipment capable of reducing workpiece deformation |
CN110788910B (en) * | 2019-11-06 | 2021-08-27 | 无锡品知信息科技有限公司 | Blade storage device for slicer |
IT202100023789A1 (en) * | 2021-09-15 | 2023-03-15 | Util Ind S P A | Multifunction press for the production of metal parts |
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Also Published As
Publication number | Publication date |
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KR20170005769A (en) | 2017-01-16 |
US10682782B2 (en) | 2020-06-16 |
JP2017013134A (en) | 2017-01-19 |
CN106334744A (en) | 2017-01-18 |
US20170008186A1 (en) | 2017-01-12 |
CN106334744B (en) | 2019-10-01 |
ES2665767T3 (en) | 2018-04-27 |
JP6931271B2 (en) | 2021-09-01 |
KR102349809B1 (en) | 2022-01-11 |
EP3115122B1 (en) | 2018-01-17 |
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