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
  • B30B15/041—Guides
• • 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
  • B30B1/26—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 cams, eccentrics, or cranks
  • B30B1/266—Drive systems for the cam, eccentric or crank axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
• • 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
  • B30B1/26—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 cams, eccentrics, or cranks
  • B30B1/28—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 cams, eccentrics, or cranks the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/14—Control arrangements for mechanically-driven presses

Definitions

• the present invention relates to the field of machining machines and more particularly relates to an electromechanical press Torque motor.
• the present invention aims to provide an electromechanical press meeting these needs.
• the invention relates to an electromechanical press as defined in claim 1. More particularly the press of the invention is dedicated to the forming of parts by deformation and / or cutting of material in a sample, and comprises: a work table defining, in an orthonormal coordinate system XYZ, a work plane P1, coinciding with the plane XZ of the marker, on which may be arranged, in one or more determined positions, one or more samples to be formed, and a forming device of parts by deformation and / or cutting of material in said samples arranged on the working plane of said table, the parts forming device comprising a forming tool arranged movable in translation in a perpendicular and perpendicular plane P2 of the work plane P1 of the table, and an electromechanical device for actuating the forming device, supported on a fixed frame in position relative to the working plane P1, the electromechanical actuation device being arranged in kinematic connection with the forming device for moving said forming tool in a back and forth movement over a determined
• the press of the invention thus has a more compact and stable structure by the integrated, substantially central arrangement of the actuating device and more particularly of its Torque motor under the working table and in the plane of movement of the tool. job.
• Torque motor provides the press of the invention a versatility and flexibility of operation without common measure.
• the use of a torque motor allows a direct drive of the forming device, without reducers, with great torque and high responsiveness. It also has other advantages described more particularly later.
• the frame comprises partition walls fixed integrally on the worktable and the anchoring base so as to encase the electromechanical actuating device on the frame.
• These partition walls advantageously make it possible to considerably stiffen and weigh down the frame in order to increase the resonant frequency of the press, avoiding the movements and jumps of the press during its operation and singularly increasing the safety factor K of the latter. this.
• lateral movements on the ground less than 0.01 mm and a maximum Von Mise stress (safety factor) of K 1000 were measured.
• the partition walls comprise an internal soundproofing lining for absorbing the operating noise of the actuating device and also at least partially the vibrations of the frame.
• the electromechanical actuation device comprises at least one connecting rod rotatably mounted at a first end on the eccentric axis of the Torque motor and at a second end on the forming device.
• the Torque type electric motor is provided with two opposite eccentric axes each connected to a connecting rod rotatably mounted at a first end on said eccentric axis of the Torque motor and at a second end on the forming device.
• the forming device is movably mounted in translation in the plane P2 on said work table.
• the forming device comprises a sliding gantry on said table, said gantry comprising a mounting crossbar of the forming tool integral at its respective ends with a first end of a connecting arm mounted at a second end to a said connecting rod of the electromechanical actuating device.
• the press comprises guide members in translation, in particular of slide type, of the forming device in the plane P2 on the work table.
• the translation guide members are arranged on the sliding gantry arms on the one hand and in lateral guide openings of said arms formed for this purpose in the table relative to the plane P2 symmetrically.
• the press of the invention comprises moving means and dynamic adjustment of the distance of the movable crossbar to the work table in the P2 plane.
• These means of movement and adjustment may include a trapezoidal screw dale for adjusting the bottom dead center of the forming tool mounted on the crosspiece.
• the actuating device is arranged movable in translation along the Y axis relative to the work table on the frame.
• the actuating device is slidably mounted on the frame by means of complementary linear guide members fixed on the actuating device and the frame and in kinematic connection with a motor assembly linear displacement in translation according to the invention. Y axis relative to the work table.
• This sliding installation of the actuating device of the press is particularly advantageous for offering great versatility and simplicity of adjustment of the press.
• the actuating device By moving the actuating device, it is not only this but also the forming device which is kinematically connected to it at the level of the connecting rods which is mobilized along the Y axis, and which is therefore adjusted in position relative to at the work table, which defines the reference plane P1 of the press.
• the engine assembly may include a hydraulic piston or flywheel secured to a screw-endless.
• the electromechanical press of the invention further preferably comprises a digital control device of the actuating device.
• This numerical control device is notably configured to regulate in real time the operation of the Torque motor of the actuating device, in particular to ensure the proper punch rate of the forming tool, for example.
• the numerical control device is also configured to control the motor assembly linear displacement of the actuating device. It is thus possible to change the configuration of the press to switch from one series to another automatically, an operator or a robotic assembly associated with the press then having only to change the forming tool on the device of forming in masked time during the adjustment
• the press of the invention can also offer an even more evolutionary configuration by the possibility offered to vary its power by associating in the actuating device a plurality of electric motors type Torques electrically connected in series and kinematically coupled one to the other at their respective driving axes.
• Figure 1 is a perspective view of an electromechanical press according to the invention in a preferred embodiment
• Figure 2 shows a sectional view along a median sagittal plane P2 of the press of Figure 1;
• Figure 3 shows a sectional view along a median transverse plane P3 of the press of Figure 1;
• Figure 4 is a view similar to Figure 1 in a second preferred embodiment
• FIG. 5 is a view similar to FIG. 2 of the press of the invention in the second embodiment of FIG. 4.
• the present invention relates to an electromechanical press 1 for forming parts by deformation and / or cutting of material in a sample, represented in a first preferred embodiment of FIGS. 1 to 3 and FIGS. 4 and 5 in a second preferred embodiment. .
• the press 1 comprises firstly a frame 2 on which is mounted an electromechanical actuating device 4 of a forming device 3 of parts in a reciprocating movement in translation in a vertical plane P2 of the press 1.
• the forming device 3 is arranged kinematically in a form described below with the actuating device 4 so as to move a forming tool 35 integral with the forming device 3 in the movement back and forth to and from a work table 5, fixed on the frame 2 and stationary on the latter.
• the forming tool 35 may be of various type depending on the forming operation to be performed, including cutting, stamping, stamping or recovery for example.
• the working table 5 defines, in an orthonormal coordinate system XYZ, an upper horizontal working plane P1, coinciding with the XZ plane of the marker, on which can be arranged, in one or more determined positions, one or more samples to be formed by impact of the forming tool 35, conventionally for a press.
• the worktable 5 has an opening in the middle of the work tool 35 to provide a clearance space for the embossing chips upon each strike of the forming tool.
• the vertical plane P2 in which the forming device 3 is moved is perpendicular and secant of the work plane P1 of the table 5.
• the frame 2 consists of a weighted base formed of a metal plate 23 or concrete under which are fixed feet 22, if adjustable.
• a weighted base formed of a metal plate 23 or concrete under which are fixed feet 22, if adjustable.
• four pillars 21 formed for example of metal girders are anchored on the base, by any suitable means such as bolting and / or welding and / or embedding. These pillars 21 support at their upper end the working table 5, itself firmly anchored on the pillars 21.
• the frame 2 and the work table 5 can be formed in a one-piece assembly, typically metallic.
• the pillars 21 are replaced by 4 partitioning and stiffening walls 25 formed preferably of steel or aluminum alloy forging, these walls 25 being anchored on the base 23 and on the working table 5, by any appropriate means such as bolting and / or welding and / or embedding.
• the walls 25 allow complete embossing of the electromechanical actuating device 4 on the frame 2, and increased stiffening thereof compared to the embodiment of Figures 1 to 3. Indeed, the walls 25 are shaped to fit on their longitudinal edges, which eliminates or in any case substantially reduce any effects of twisting of the work table 5 relative to the base 23 during the operating cycles of the press 1, and also to reduce the vibrations significantly.
• this second embodiment with partitioning and stiffening walls advantageously makes it possible to double the resonant natural frequency of the press with respect to the embodiment of FIGS. 1 to 3, while reducing the movements on the ground during operation. a factor greater than 10.
• the walls 25 are further coated or integrate into a metal structure sheet metal in the form of a sandwich a layer of acoustic insulation and antivibration layer.
• a facing may consist of any suitable flame retardant insulation, especially based on natural fibers and synthetic compacted or thermoformed synthetic foams. This improves the safety and comfort of operators on production sites by increasing the absorption of noise from operating the press.
• the electromechanical actuating device 4 is mounted on the frame 2 in an intermediate position between the plate 23 of the base and the table 5, therefore in a central position in the plane of displacement of the forming device 3 and ideally on the V axis of the forming tool, located under the worktop P1.
• the forming device 3 is coupled to the actuating device such that the forming tool 35 is held in any position in or above the work plane P1 of the work table 5.
• the electromechanical actuating device 4 comprises an electric motor 41 of Torque type, mounted integral and movable in translation along the pillars 21 of the frame 2 by means of a carriage 45 on rails or rails 7 fixed in internal reservations of the pillars 21.
• the carriage 45 and the slideways 7 thus form complementary linear guiding members of the actuating device 4 on the frame 2.
• the electromechanical actuating device 4 is further arranged in kinematic connection with a set motor 6 linear displacement in translation along a central vertical axis V contained in the plane P2 relative to the work table 5.
• the electromechanical actuating device 4 is thus adjustable in height in the plane P2.
• the motor assembly 6 is advantageously arranged on the plate 23 of the base of the frame 2 and fixed thereto by any suitable means, as well as the housing 42 of the motor 41 of the actuating device 4.
• the motor assembly 6 comprises a screw-endless 61 rotatably mounted along the axis V on the plate 23 in a central hole thereof.
• the worm 61 has a lower section 611 forming a drive shaft secured to a flywheel 62 mounted coaxially on the drive shaft.
• the worm 61 also has a threaded upper section 612 extending in the extension of the lower section 611 along the axis V through a bell 63 of the flywheel 62 in the orifice 231 of the plate 23 to avoid any translation of the screw 61 along the axis V, and into a blind bore along the axis V of internal diameter substantially equal to the outer diameter of the threaded section of the screw 61.
• the flywheel 62 can be advantageously controlled by a mechanical drive system, electronic and / or hydraulic, according to standard techniques in the field of industrial automation.
• this actuation is electro-controlled by the central control numerical control of the entire press and the electric motor 41 as described in more detail below.
• the electric motor 41 of the electromechanical actuating device is preferably a Torque type motor.
• One such motor has the advantage of being able to be actuated and controlled essentially by a reference electronic signal in a substantially instantaneous manner, that is to say without inertia.
• This type of motor is also fully electronically controllable, where appropriate with variations in speed and power / torque during the cycle depending on the parts worked.
• the Torque motor finally makes it possible to vibrate the forming device during a cycle, possibly with an adjustable pitch, to improve the surface conditions of stamped parts, for example. It is thus possible to initiate coin stamping cycles incorporating vibrations of the forming device 3, which is not permitted by any another type of electromechanical press to date, further providing a possibility of adjusting the frequencies and amplitudes of vibrations.
• the motor 41 preferably comprises two eccentric axes 43d, 43g mounted on bearings to each of which is coupled by a first ball joint (or any similar coupling) a first end of a connecting rod 44d, 44g whose second end is mounted by a second ball joint (or any similar coupling) on the forming device 3.
• the two eccentric axes 43d, 43g are such that they are exactly symmetrical to one another with respect to the planes medians P2, P3 of the press 1. Indeed, the slightest axial offset of the eccentric relative to these two planes can be critical to the operation of the press, including the regular guidance of the forming device and the integrity of the engine 41.
• Torque motor 41 also has the advantage of offering a great versatility of configuration to the actuating device 4, in particular to vary the power. It is in particular possible to associate in series a plurality of Torque motors 41 and to couple them axially in order to double the power of the press.
• the forming device 3 is mounted movably in translation in the vertical plane P2 on or with respect to said work table 5. It advantageously comprises a sliding gantry by slides 8 on said table 5, said gantry comprising a crossmember 31 mounting a forming tool 35 via a tool holder 34, said cross member being integral at its respective ends, for example by welding or bolting, with a first end of a connecting arm 32d, 32g mounted rotating at a second end by an axis 36d, 36g to one of said connecting rod 44d, 44g of the electromechanical actuating device 4 via a second ball joint traversed by said axis 36d, 36g according to conventional methods for the skilled person.
• the forming device 3 is thus driven in translation on the table 5 in the plane P2 by a conventional rod-crank system in the field of machining presses.
• the slides 8 are preferably arranged on the arms 32d, 32g of the sliding gantry on the one hand and in lateral openings 51 for guiding said arms. formed for this purpose in the table 5 symmetrically to the plane P2.
• displacement means and dynamic adjustment of the movable crosspiece distance 31 -table 5 work are provided on the forming device for adjusting the bottom dead center and the absolute rule located at the table and a compensation for dilation during use of the press.
• the press 1 of the invention advantageously further comprises a digital control device, not shown in the figures.
• This numerical control device well known in itself to those skilled in the field of machine tools and industrial automation, is preferably preferably configured to electronically control the actuating device 4 according to work cycles. desired and preprogrammed in the digital control or loaded into it via an enterprise network.
• the numerical control can thus in particular perform the continuous adjustment of the feed parameters and speed of rotation of the Torque motor 41 to deliver a given power of the press.
• the numerical control can also advantageously control the motor assembly 6 linear displacement before adjusting the height of the Torque motor 41 on the frame 2 and thus the strike height of the forming tool 35 relative to the plane P1 of the table work 5 as needed.
• the numerical control can also be associated with auxiliary automatic machines for loading the press 1 and for changing the forming tool 35 on the tool holder 35.
• the operation of the press 1 is in itself conventional to that of a press with crank-handle actuation, well known to those skilled in the art.
• the activation of the Torque motor 41 causes the eccentrics 43d, 43g and the end of the link rod 42d, 42g which is coupled thereto to rotate, which transmits to the forming device 3, which is guided in translation on the work table 5 a translatory movement back and forth in the plane P2 which causes the working tool 35 alternately in the plane P1 to perform a forming operation of a sample.
• a sample refers to any piece or piece of metal raw material to be formed or preformed part to be taken back.
• the location of the electromechanical actuating device under the work table 5 gives the press compactness and increased stability.
• the use of a Torque motor provides the advantage of an essentially electronic instantaneous engine control, which optimizes the power consumption of the engine according to the work performed.
• the proposed press structure a horizontal press, in which the frame 2 is pivoted by 90 ° as well as the actuating device 4 and forming device 3.
• the vertical orientation of the motor torque 41 does not interfere with its operation and linear guide rails of the forming device 3 on the work table 5 ensures in any event, with adequate lubrication, a good performance of the press even in an inclined position.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Press Drives And Press Lines (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications Before (1)

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• 2018
  • 2018-03-05 EP EP18159893.9A patent/EP3536493A1/de not_active Withdrawn
• 2019
  • 2019-03-04 JP JP2020546375A patent/JP7300742B2/ja active Active
  • 2019-03-04 CN CN201980016590.8A patent/CN111819071B/zh active Active
  • 2019-03-04 WO PCT/EP2019/055250 patent/WO2019170571A1/fr active Search and Examination
  • 2019-03-04 EP EP19707031.1A patent/EP3762223B1/de active Active
  • 2019-03-04 US US16/976,854 patent/US20200406567A1/en not_active Abandoned

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