Pneumatic circuit for numerically controlled lathe pneumatic door opening and closing

Abstract

The invention discloses a pneumatic circuit for numerically controlled lathe pneumatic door opening and closing. The pneumatic circuit comprises an exhaust loop, and the exhaust loop is provided witha high-speed and high-load pneumatic cushion loop. The high-speed and high-load pneumatic cushion loop comprises a single-pole double-acting pneumatic cylinder, a first reducing valve, a second reducing valve, a first speed regulation valve, a second speed regulation valve, a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve. An air source is connected with the third electromagnetic valve through a pipeline and the first reducing valve on the pipeline, the third electromagnetic valve is connected with the first electromagnetic valve and the second electromagnetic valve, the first speed regulation valve is connected with a piston end cavity of the single-pole double-acting pneumatic cylinder, and the first speed regulation valve is connected withthe first electromagnetic valve. The second speed regulation valve is connected with a connecting pole end cavity of the single-pole double-acting pneumatic cylinder, the second speed regulation valveis connected with the second electromagnetic valve, the second reducing valve is connected with the first electromagnetic valve and the second electromagnetic valve, and the first reducing valve andthe second reducing valve are connected with the exhaust loop. The pneumatic circuit is good in cushioning effect, lightens sliding door impact, avoids loosing of the pneumatic cylinder and sliding door guide rail screws and thus guarantees safety and the service life of the pneumatic cylinder.

Description

technical field [0001] The invention relates to the technical field of control equipment for a pneumatic door of a numerical control machine tool, in particular to a pneumatic circuit for a pneumatic door switch of a numerical control lathe. Background technique [0002] Due to the special structural requirements, the pneumatic door of CNC wheel hub car used in the prior art has a structural mass that is too large, for example, the mass will be greater than 200kg. At the same time, the customer requires the opening and closing time of the pneumatic door to be as short as possible, and some technical requirements need to be met within 5S. The inner and pneumatic doors can reach a reciprocating stroke of 900mm, minimizing the auxiliary working time of the equipment. The impact of the short switching time of the pneumatic door and the reduction of the auxiliary working time of the equipment is that the faster running speed causes large vibration, large inertia, and poor cushion...

AI Technical Summary

Problems solved by technology

[0002] Due to the special structural requirements, the pneumatic door of CNC wheel hub car used in the prior art has a structural mass that is too large, for example, the mass will be greater than 200kg. At the same time, the customer requires the opening and closing time of the pneumatic door to be as short as possible, and some technical requirements need to be met within 5S. The inner and pneumatic doors can reach a reciprocating stroke of 900mm, minimizing the auxiliary working time of the equipment

The impact of the short switching time of the pneumatic door and the reduction of the auxiliary working time of the equipment is that the faster running speed causes large vibration, large inertia, and poor cushioning of the machine tool, which affects the accuracy of the machine tool. Damage, increase the maintenance time and cost; sometimes the cylinder pressure is too high to cause deformation of the guide rail of the pneumatic door, affecting the sealing effect of the machine tool, etc.

Conventional pneumatic circuit adjustments cannot achieve a satisfactory damping effect under these conditions

If the intake air volume of the speed control valve is reduced, the cushioning effect is good, but the opening and closing time is too long, which does not meet part of the use requirements; otherwise, the opening and closing time meets the requirements, but the cushioning effect is not good, and the impact of the sliding door is serious. Loose screws cannot guarantee the safety and service life of the cylinder

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