Full-hydraulic drive hammer-forging electro-hydraulic hammer hydraulic system
A technology of hydraulic system and electro-hydraulic hammer, which is applied in the testing of fluid pressure actuation system, fluid pressure actuation device, servo motor, etc. Accurate and controllable position, sufficient strike force, and high strike frequency
Active Publication Date: 2020-11-17
TAIYUAN UNIV OF TECH
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Problems solved by technology
Electro-hydraulic hammer is one of the most common free forging equipment. Compared with traditional air hammer and hydraulic-pneumatic hammer, it has the characteristics of sufficient striking force and flexible operation. However, the existing electro-hydraulic hammer has low striking force, low forging frequency, The degree of automation is low, and the impact of the hydraulic system is large. With the advancement of science and technology, the existing electro-hydraulic hammer has been difficult to meet the needs of modern technology in terms of forging frequency and automation.
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[0029] Such as Figure 1-Figure 2 As shown, the present invention provides a fully hydraulically driven open-die forging electro-hydraulic hammer hydraulic system, including a pilot-level hydraulic cylinder, a power-level hydraulic cylinder, a pilot-level hydraulic cylinder circuit, and a power-level hydraulic cylinder circuit. The power-level hydraulic cylinder circuit includes Stepless speed regulation liquid filling circuit, stepless speed regulation lifting hammer circuit, accumulator circuit and flexible unloading circuit;
[0030] The pilot stage hydraulic cylinder includes a first cylinder body 100, a first piston 101, and a first piston rod 102. The first piston 101 is coaxially connected downward to the first piston rod 102. The upper surface of the first piston 101 is in contact with the first cylinder body. 100 forms a first rodless chamber 103, forms a first rod chamber 104 between the lower surface of the first piston 101 and the first cylinder 100, and a built-in...
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The invention discloses a full-hydraulic drive hammer-forging electro-hydraulic hammer hydraulic system which is characterized by comprising a pilot-stage hydraulic cylinder, a power-stage hydraulic cylinder, a pilot-stage hydraulic cylinder loop and a power-stage hydraulic cylinder loop. The power-stage hydraulic cylinder loop comprises a stepless speed control liquid filling loop, a stepless speed control hammer lifting loop, an energy accumulator loop and a flexible unloading loop; the pilot-stage hydraulic cylinder loop and the power-stage hydraulic cylinder loop are cooperatively controlled to meet the functional requirements of hammer lifting, light forging, heavy forging, slow forging, fast forging, hammer suspending and the like of the full-hydraulic driven free-forging electro-hydraulic hammer; the main position closed-loop control of the pilot-stage hydraulic cylinder and the slave position closed-loop control of the power-stage hydraulic cylinder ensure that the positions ofa second piston and a second piston rod of the power-stage hydraulic cylinder are accurately controllable; the pressure closed-loop control of the pilot-stage hydraulic cylinder and the pressure closed-loop control of the power-stage hydraulic cylinder ensure that the pressure of each system of the full-hydraulic drive hammer-forging electro-hydraulic hammer hydraulic system is adjustable on line; and a proportional unloading valve ensures that the high pressure of a third rod cavity of the power-stage hydraulic cylinder is stably released without impact.
Description
technical field [0001] The invention belongs to the technical field of free forging electro-hydraulic hammer hydraulic systems, and in particular relates to a fully hydraulically driven free forging electro-hydraulic hammer hydraulic system. Background technique [0002] Free forging is the use of impact force or pressure to deform metal between the upper and lower anvils to obtain forgings of required shape and size. Electro-hydraulic hammer is one of the most common free forging equipment. Compared with traditional air hammer and hydraulic-pneumatic hammer, it has the characteristics of sufficient striking force and flexible operation. However, the existing electro-hydraulic hammer has low striking force, low forging frequency, The degree of automation is low, and the impact of the hydraulic system is large. With the advancement of science and technology, the existing electro-hydraulic hammer has been difficult to meet the needs of modern technology in terms of forging fre...
Claims
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IPC IPC(8): F15B1/02F15B11/16F15B13/06F15B19/00
CPCF15B1/02F15B11/16F15B13/06F15B19/00
Inventor 和东平王涛徐慧东张彦杰王君刘江林李亚冠
Owner TAIYUAN UNIV OF TECH