WO2005005132A1 - Presse a vis hydraulique - Google Patents

Presse a vis hydraulique Download PDF

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Publication number
WO2005005132A1
WO2005005132A1 PCT/CN2004/000448 CN2004000448W WO2005005132A1 WO 2005005132 A1 WO2005005132 A1 WO 2005005132A1 CN 2004000448 W CN2004000448 W CN 2004000448W WO 2005005132 A1 WO2005005132 A1 WO 2005005132A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
screw
nut
cylinder
push
Prior art date
Application number
PCT/CN2004/000448
Other languages
English (en)
Chinese (zh)
Inventor
Yourong Lu
Original Assignee
Shanghai Yunliang Forging Press Co., Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Yunliang Forging Press Co., Ltd filed Critical Shanghai Yunliang Forging Press Co., Ltd
Priority to JP2006517932A priority Critical patent/JP2007506555A/ja
Publication of WO2005005132A1 publication Critical patent/WO2005005132A1/fr

Links

Classifications

    • 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
    • B30B1/18—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 screw means
    • B30B1/23—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 screw means operated by fluid-pressure means

Definitions

  • the present invention relates to a forging and pressing machine equipment, and particularly to a push cylinder hydraulic screw press.
  • the push-cylinder hydraulic screw press uses the thrust of a hydraulic cylinder and the gravity of a moving part composed of a flywheel, a screw, a slider and an upper die to drive work to realize pressing forgings.
  • this hydraulic screw press has a simple structure, easy manufacture, low cost, and convenient maintenance, but the failure rate of the brakes and overload protection devices of traditional hydraulic screw presses High, poor reliability, poor sensitivity of the hydraulic control system, large limitations, not suitable for large tonnage hydraulic screw presses.
  • the structure of the screw and the slider is screw-connected with the screw and the nut, and then a cylindrical pin is fixed on the screw and the nut to prevent loosening.
  • This nut anti-loosening structure because the cylindrical pin is difficult to withstand the large radial force from the press in the working state, it is easy to create a gap between the screw and the nut, so that the nut loosens until it is damaged, which directly affects the press Work efficiency.
  • the brake devices in forging machines such as traditional double-disc friction presses are mostly mechanical brakes.
  • the brake device of this structure has poor reliability and high failure rate in actual use, and the brake belt often breaks. The aging of the friction plate often causes brake failure. Summary of the invention
  • the technical problem to be solved by the present invention is to overcome the defects existing in the prior art mentioned above, and provide a new push-cylinder hydraulic screw press with simpler structure, high reliability, good sensitivity of the hydraulic control system, and strong practicability.
  • a push-cylinder hydraulic screw press includes a frame, the frame is provided with a rotatable screw, a flywheel is fixed at the upper end of the screw, and a lower end of the screw is fixed.
  • a slider and an upper die are fixedly arranged, and the slider can slide up and down along the groove on the frame to realize pressing and forging. It is characterized in that at least two hydraulic working cylinders are fixed on both sides of the frame, and the piston rod of the cylinder is fixedly connected with the slider on the frame; the central part of the upper end cover of the hydraulic working cylinder is provided with a conical opening.
  • the front end of the piston rod is a corresponding conical buffer body; when the piston rod moves up and down, the conical buffer body and the conical through hole of the upper end cover are in a sliding connection; a key groove is arranged at the bottom of the nut in the screw and slider fixing device
  • the upper part of the nut seat is also provided with a key groove, and the key groove between the nut and the nut seat is fixedly connected by a flat key; a servo valve connected to the handle in the hydraulic system, the auxiliary valve core of which is connected with a three-position four-way slide valve through a mechanical link
  • the spools are connected.
  • the present invention removes the original double-disc Mocha disc mechanism of the original double-disc Mocha press.
  • Working hydraulic working cylinders are placed on both sides or around the frame as a power source, and the thrust of the working cylinder can be hydraulically controlled to drive
  • the gravity driven part of the moving part works to realize the pressing forging. It has the advantages of simple structure, reliable performance, and sensitive control.
  • the working cylinder also plays the role of balancing the slider, so the traditional screw press is also eliminated in the present invention. Two balancing cylinders.
  • the anti-loosening structure of the nut in the screw and slider coupling device is improved, the tightening force of the screw and the nut is increased, and the radial bearing capacity of the nut can be greatly improved.
  • the servo valve is used as the pilot valve to control the large-diameter slide valve to improve the sensitivity of the hydraulic control system, and the accumulator with hydraulic buffer function is set in the hydraulic control system as an extra-large-capacity accumulator without piston.
  • FIG. 1 is a schematic structural diagram of the present invention
  • FIG. 3 is a schematic structural diagram of another embodiment of the present invention.
  • FIG. 4 is a sectional view of the structure of a hydraulic working cylinder of the present invention.
  • FIG. 5 is an enlarged sectional view of the structure of the screw and slider fixing device of the present invention.
  • Fig. 6 is a structural schematic diagram of a hydraulic system of the present invention.
  • 2 auxiliary valves Core 19 mechanical connecting rod, 20 three-position four-way spool valve, 20.1 valve core, 21 check valve, 22 oil pump, 23 oil tank, 24 accumulator, 25 hydraulic control check valve, 26 check valve, 27 Check valve, 29 solenoid relief valve, 30 oil transfer pump, 31 control oil supply pump, 32 check valve, 33 solenoid relief valve, 34 two-position three-way solenoid directional valve, 35 oil level controller, 36 feedback device, A three-position four-way spool valve output port, B three-position four-way spool valve output port, P three-position four-way spool valve input port, T three-position four-way spool valve oil return port.
  • the present invention includes a frame 1, which is provided with a rotatable screw 2, a flywheel 3 is fixed on an upper end of the screw 2, and a slider is fixed on a lower end of the screw 2.
  • the slider 4 can slide up and down along the groove on the machine frame 1 to realize pressing and forging.
  • the present invention is provided with at least two hydraulic working cylinders 5 and is symmetrically fixed on both sides of the frame by bolts 6.
  • the cylinder piston rod 7 and the slider 4 on the frame 1 are fixedly connected by nuts 8. .
  • four hydraulic working cylinders 5 are symmetrically fixed on the periphery of the frame 1 by bolts 6, and the piston rod 7 and the slider 4 are fixedly connected by nuts 8, respectively.
  • the upper end of the hydraulic working cylinder block 5 of the present invention is fixedly connected to the upper end cover 9 by a screw.
  • the upper end cover 9 is provided with a conical through hole 10 at the center and is connected to a hydraulic pipe.
  • the upper end of the piston rod 7 is connected to the conical buffer body 11 corresponding to the conical through hole 10 in the center of the upper end cover by screws, that is, the taper and taper of the conical through hole 10 in the upper end cover of the hydraulic cylinder block 5 and the conical buffer body 11
  • the direction is the same.
  • the lower part of the working cylinder block 5 is provided with oil inlet and outlet holes, and is connected with a hydraulic pipeline.
  • the piston rod 7 moves up and down, the conical buffer body 11 and the conical through-hole 10 of the upper end cover are in a sliding connection.
  • the tapered through hole 10 and the tapered buffer body 11 have a taper of 2 to 5 degrees and a working length of 60 to: L20mm.
  • the taper of the conical through hole 10 and the conical buffer body 11 is 5 degrees, working length is 120 legs.
  • the piston rod 7 moves up and down. Because both the conical through-hole 10 and the conical buffer body 11 are cone-shaped, the hydraulic system drives the piston rod 7 to move. During continuous sliding, the contact between the two will increase. It is closer, and a throttle ring hole is formed, and the throttle ring hole is used for buffering to achieve a braking effect, which effectively prevents the slider 4 from hitting the top.
  • the invention greatly improves the working efficiency of the press and ensures its safety.
  • the present invention has a key groove at the bottom of the nut 12 in the fixing device of the screw 2 and the slider 4, and a key groove is also provided at the upper portion of the nut seat 13.
  • the key groove between the nut 12 and the nut seat 13 is fixed by the flat key 14 connection.
  • the outer edges of the nut 12 and the nut seat 13 are fixedly connected by bolts 15.
  • the screw 2 is connected to the nut 12 through a bearing 16.
  • the nut is divided into two bodies, that is, the nut 12 and the nut seat 13, and the original cylindrical pin is changed to the flat key 14 structure.
  • the screw lifting angle of the screw 2 according to the present invention is 15 ° ⁇ 1 °.
  • the screw length is 3375 mm
  • the screw diameter is 500 mm
  • the nut length is 1030 mm
  • the nut diameter is 690 mm.
  • screw length is 3475 mm
  • screw diameter is 550 mm
  • nut length is 1110 mm
  • nut diameter is 790 mm
  • screw length is 3980 mm and screw diameter is 650.
  • nut length is 1300 mm, nut diameter is 940 mm; on a nominal 4000-ton press, the screw length is 4450 mm, the screw diameter is 750 mm, the nut length is 1600 mm, and the nut diameter is 750 mm.
  • a servo connected to a joystick 17 in the hydraulic system according to the present invention 1 ⁇ ⁇ 18 ⁇ Valve 18, its auxiliary spool 18. 2 through the mechanical link 19 and the spool 20.
  • 1 of the three-position four-way slide valve 20 connected.
  • the output ports A and B of the three-position four-way slide valve 20 are connected to the upper and lower chambers of the hydraulic working cylinder block 5. 1 and 5. 2 through hydraulic pipes, respectively, and are connected to the lower chamber of the cylinder block.
  • the corresponding input port P of the output port A is connected to the oil pump 22 through a hydraulic pipe, a one-way valve 21, and is connected to the upper cavity of the cylinder 5.1.
  • the oil return port T corresponding to the output port B of the hydraulic pipe is connected with the hydraulic pipe through
  • the fuel tank 23 is in communication.
  • An accumulator 24 communicates with the hydraulic chamber 5.2 hydraulic tube through the hydraulically controlled check valve 25 and the check valve 26, and communicates with the hydraulic tube in the upper cavity of the cylinder through the check valve 27. In addition, it also The output pipe of the check valve 21 connected to the oil pump 22 is in communication.
  • the slider 4 of the hydraulic screw press is stopped.
  • the oil pump 22 fills the accumulator 24 with oil.
  • the electromagnetic relief valve 29 is unloaded, and the oil pump 22 performs an empty cycle.
  • the oil delivery pump 30 is designed to supply oil to the oil pump 22, and the purpose is to make the oil pump 22 fully absorb oil, have high efficiency, reduce noise, and improve the life of the oil pump.
  • the main spool 18.1 of the servo valve 18 moves to the right, and at this time, the pressure oil in the b cavity from the control oil supply pump 31 passes through the secondary spool 18.2 and the main spool 18.1 The internal channel between them enters the a cavity.
  • the secondary spool 18.2 moves to the right (the force of the a cavity is greater than the force of the b cavity), thereby driving the three-position four-way slide valve. 20
  • the spool moves to the right and opens port B of the valve.
  • the pressure oil from the accumulator 24 enters the upper cavity of the piston 7.1 in the hydraulic cylinder 5 and the pressure oil pushes the piston 7.1 and drives the slider 4, the screw. 2.
  • the flywheel 3 descends, and the flywheel 3 rotates continuously to store the kinetic energy required for pressing and forging during the descending process.
  • the control handle 17 can be moved to the middle to close the three-position four-way slide valve 12 to cut off the pressure oil source and stop the piston 4 in the hydraulic working cylinder 5 At the moment, the inertia of the moving part makes the upper cavity of the piston 4 in the hydraulic working cylinder block 5 generate suction.
  • the check valve 10 is opened, and the oil in the oil tank 27 is sucked in for replenishment.
  • the high-pressure oil in the lower cavity of the piston 4 in 5 can open the check valve 13 and enter the accumulator 18 through the hydraulic control check valve 16.
  • the accumulator 18 buffers and absorbs the kinetic energy of the moving part, thereby reducing the slider. Press the energy of the forging to achieve the purpose of regulating the energy.
  • the oil pump 31 is an oil supply pump that provides a hydraulic system for controlling the oil to the servo valve 18.
  • the function of the electromagnetic overflow 31 is to ensure that the oil pressure system is unloaded when the oil pump 31 starts, and the oil pump enters no-load to start. And adjust the pressure of the hydraulic system.
  • the role of the two-position three-way electromagnetic directional valve 34 is to ensure that the hydraulically controlled non-return valve 25 is closed reliably in the stopped state, so that the pressure oil in the accumulator 24 does not leak, and to ensure that the hydraulically controlled non-return valve 25 is in the started state. Turn on to supply pressure oil to the hydraulic system.
  • the role of the electromagnetic relief valve 29 is to ensure that the hydraulic system is unloaded when the main oil pump 22 is started, the oil pump 22 is started with no load, to adjust the system pressure, and to control the system pressure and unload.
  • the upward pressure and unloading of the electromagnetic relief valve 29 are signaled by the oil level controller 20 to realize automatic control.
  • a signal is sent from the transmitting element of the oil level controller 35, the electromagnetic relief valve 29 is unloaded, and the system enters an empty cycle;
  • the oil in the accumulator 24 is When the position is set to the set lower position, a signal is sent from the transmitting element of the oil level controller 35, the electromagnetic relief valve 29 is pressed up, and the system supplies pressure oil to the accumulator 24.
  • the function of the feedback device 36 is to reduce the impact caused when the moving part suddenly stops when the slider 4 moves up to the extreme position.
  • the feedback device 36 touches the feedback device 36, and pulls the joystick 17 to the intermediate position through the link system, and closes the three-position four-way slide valve 20 through the servo valve 18 to make the oil circuit system
  • the lower cavity of the piston 7.1 in the hydraulic working cylinder 5 is no longer supplied with pressure oil, the lifting power of the slider 4 is eliminated, and the top collision is prevented.
  • the invention provides a new push-cylinder hydraulic screw press with simpler structure, high reliability, good sensitivity of the hydraulic control system, and strong practicability. Any similar design of the push-cylinder hydraulic screw pressure mechanism based on the concept and principle of the present invention should belong to the protection scope of the present invention.

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

Abstract

L'invention concerne une presse à vis hydraulique, comprenant une châssis sur lequel est disposée une tige de vis. Le volant est disposé sur l'extrémité supérieure de la tige de vis. Le bloc coulissant et le poinçon supérieur sont disposés sur l'extrémité inférieure de la tige de vis. Le bloc coulissant peut coulisser sur le châssis. Au moins deux vérins hydrauliques sont fixés sur les deux côtés du châssis, et la tige de piston est reliée au bloc coulissant. La partie centrale de l'élément de recouvrement de l'extrémité supérieure du vérin hydraulique présente un trou traversant conique. Le corps amortisseur conique correspondant est placé sur l'extrémité avant de la tige de piston. Dans le moyen de fixation de la tige de vis et du bloc coulissant, un logement de clavette est situé respectivement sur l'extrémité inférieure de l'écrou et sur l'extrémité supérieure du siège de l'écrou. L'écrou et le siège d'écrou sont fixés par une clavette plate. La partie centrale de la soupape auxiliaire du servodistributeur est raccordée à la poignée et à la partie centrale de la soupape du distributeur 3 / 4 par l'intermédiaire d'une tige de raccordement.
PCT/CN2004/000448 2003-07-10 2004-05-08 Presse a vis hydraulique WO2005005132A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006517932A JP2007506555A (ja) 2003-07-10 2004-05-08 液圧スリュープレス

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03141561.X 2003-07-10
CN 03141561 CN1565770A (zh) 2003-07-10 2003-07-10 推缸式液压螺旋压力机

Publications (1)

Publication Number Publication Date
WO2005005132A1 true WO2005005132A1 (fr) 2005-01-20

Family

ID=33752649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2004/000448 WO2005005132A1 (fr) 2003-07-10 2004-05-08 Presse a vis hydraulique

Country Status (3)

Country Link
JP (1) JP2007506555A (fr)
CN (1) CN1565770A (fr)
WO (1) WO2005005132A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107956766A (zh) * 2017-12-20 2018-04-24 燕山大学 一种液压管路振动能量回收装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102784866A (zh) * 2012-08-29 2012-11-21 太仓奥科机械设备有限公司 一种压力机
CN102922764B (zh) * 2012-11-23 2015-01-07 上海运良锻压机床有限公司 推缸式液压螺旋压力机
CN105465068A (zh) * 2015-12-29 2016-04-06 南京浦镇海泰制动设备有限公司 一种液压供油系统的供油方法
CN112427595B (zh) * 2020-11-13 2022-08-16 江苏新泰隆管件有限公司 一种便于维护保养的自动螺旋压力机
CN113145781B (zh) * 2021-02-24 2023-01-13 周美丽 一种主缸行程不包含空载行程的高速液压机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062284A (en) * 1975-10-27 1977-12-13 Hiroyasu Shiokawa Friction press
US4064733A (en) * 1976-10-05 1977-12-27 Anatoly Sergeevich Grigorenko Press
US4782749A (en) * 1985-08-05 1988-11-08 Kabushiki Kaisha Mitsuishi Fukai Tekkosho Screw press with an actuator
CN1093318A (zh) * 1993-04-05 1994-10-12 山东工业大学 快卸压高能螺旋压力机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062284A (en) * 1975-10-27 1977-12-13 Hiroyasu Shiokawa Friction press
US4064733A (en) * 1976-10-05 1977-12-27 Anatoly Sergeevich Grigorenko Press
US4782749A (en) * 1985-08-05 1988-11-08 Kabushiki Kaisha Mitsuishi Fukai Tekkosho Screw press with an actuator
CN1093318A (zh) * 1993-04-05 1994-10-12 山东工业大学 快卸压高能螺旋压力机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107956766A (zh) * 2017-12-20 2018-04-24 燕山大学 一种液压管路振动能量回收装置

Also Published As

Publication number Publication date
JP2007506555A (ja) 2007-03-22
CN1565770A (zh) 2005-01-19

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