Combined friction clutch brake with low driven system inertia of mechanical press

Abstract

A combined friction clutch brake with low driven system inertia of a mechanical press comprises a press body. The press body is connected with a transmission system composed of a crankshaft and accessories of the crankshaft. A flywheel and a clutch-brake supporting sleeve are installed on the crankshaft, a friction clutch and a friction brake are connected to the clutch-brake supporting sleeve, the friction clutch and the friction brake are provided with rigid interlocking structures, and the friction clutch and the friction brake are connected with a hydraulic pipeline system. The flywheel is driven by a driving motor to move, the flywheel can independently rotate and move on the crankshaft, and the movement and stop of the crankshaft are controlled by using a friction clutch brake. The crankshaft does not need to be machined with a center air hole, and the combined friction clutch brake has the advantages of being low in driven system rotational inertia, small in friction heating amount, good in heat dissipation effect, high in energy utilization rate, compact in structure, coordinated in action, easy and convenient to operate, convenient to maintain, low in noise pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanical presses for forging equipment, and in particular relates to a combined friction clutch brake with low inertia of the driven system of the mechanical press. Background technique [0002] The mechanical press is often subjected to short-term peak loads, and it is often necessary to frequently move and stop the slider during the forging work. Therefore, the transmission system of the mechanical press often has a flywheel with a large inertia, and the main energy of the forging work is Output from the rotational kinetic energy of the flywheel. Based on the main reasons of the above two aspects, as well as the convenience for operators to debug molds and ensure the safety of workers, mechanical presses are basically equipped with clutches and brakes, the heart parts of mechanical presses, to control the movement of the working mechanism of the press. and stop. The reliability, safety and convenien...

AI Technical Summary

Problems solved by technology

[0009] (1) The cylinder that transmits torque when the clutch is engaged will rotate synchronously with the crankshaft, so that the driven system includes the driven part of the cylinder piston, resulting in the moment of inertia J of the driven system c increase, the sensitivity of the clutch action is poor, when the clutch is engaged, the friction work on the surface of the friction material and the moment of inertia J c proportional to such that J c ω m 2 / 2 increases, resulting in severe heat generation of the friction material of the clutch, increased wear of the friction material, and reduced service life

[0010] (2) The driving source of the coupling and braking of the clutch and the brake adopts the driving method of compressed air, while the energy conversion rate of the compressed air generated by the air compressor is low, and the noise of the air compressor itself is large, causing noise pollution in the workshop; In addition, compared with the hydraulic pump system, the air compressor occupies a large area and the pipeline is complicated

[0011] (3) During the engagement and braking process of the clutch and brake, if the driving method of compressible air is used, the clutch engagement process and the brake braking process will be slow, which will easily cause the clutch and brake to be stuffy, or the brakes will fail. failure; and the use of pneumatic methods, resulting in up to 110dB (A) intake and exhaust noise during the working process of the clutch and brake, serious environmental pollution, and serious damage to the physical and mental health of workers

[0012] (4) Because the cylinder of the clutch will rotate with the crankshaft, a rotary joint (swivel joint) must be used to introduce compressed air into the center hole of the crankshaft, and then into the clutch cylinder through the rotary seal, resulting in compressed air transmission Many places need to be sealed during the journey, and holes must be drilled in the middle of the crankshaft, which makes the structure complex, large air leakage, and low energy utilization

[0013] (5) The clutch and brake are placed between the flywheel and the machine body, the heat generated by friction cannot be dissipated in time, and the flywheel must be removed when repairing and disassembling the friction material and replacing the friction material, so the maintenance period is long and maintenance is inconvenient

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