Hydraulic system for welding equipment

Abstract

The utility model discloses a hydraulic system for welding equipment, which comprises an oil tank, and the oil tank pumps hydraulic oil into a first oil cylinder, a second oil cylinder, a jacking oil cylinder and a centering oil cylinder through a gear oil pump. Oil conveying pipes connected with all oil cylinders of the oil tank are provided with a proportional servo direction valve, a stacked hydraulic control one-way valve, an electromagnetic directional valve, a stacked hydraulic control one-way valve, an electromagnetic directional valve and the like. The control device is reasonable and ingenious in structural design, and the centering tool of the welding machine can achieve accurate control of simultaneous action and independent action.

Description

Technical Field

[0001] The utility model relates to a hydraulic system, especially a hydraulic system for welding equipment. Background Art

[0002] In an automatic welding equipment, moving devices such as each robotic arm need to be driven by different oil cylinders. The oil cylinder drive requires a hydraulic control system. The existing automatic welding equipment adopts simple synchronous control for the heavy tooling, and it is impossible to achieve precise control of simultaneous drive and individual actions of multiple oil cylinders, which is not conducive to ensuring the high quality of welding operations. Summary of the Utility Model

[0003] In order to overcome the above deficiencies, the utility model provides a hydraulic system for welding equipment, which can achieve precise control of both simultaneous action and individual action for the medium tooling.

[0004] To achieve this purpose, the structure adopted by the utility model is as follows: A hydraulic system for welding equipment includes an oil tank. The oil outlet of the oil tank transports hydraulic oil to a first oil cylinder, a second oil cylinder, a lifting oil cylinder, and a centering oil cylinder through an oil delivery pipe by a gear oil pump. The gear oil pump is driven by an electric motor. A first proportional servo direction valve and a first stacked hydraulic control check valve are arranged on the oil delivery pipe connecting the oil tank and the first oil cylinder; a second proportional servo direction valve and a second stacked hydraulic control check valve are arranged on the oil delivery pipe connecting the oil tank and the second oil cylinder; the oil tank is also connected to both the first oil cylinder and the second oil cylinder simultaneously through a third proportional servo direction valve and a third stacked hydraulic control check valve; a first electromagnetic directional valve, a first stacked throttle valve, and a fourth stacked hydraulic control check valve are arranged in sequence on the oil delivery pipe connecting the oil tank and the lifting oil cylinder; a second electromagnetic directional valve, a second stacked throttle valve, and a fifth stacked hydraulic control check valve are arranged in sequence on the oil delivery pipe connecting the oil tank and the centering oil cylinder; the first proportional servo direction valve, the second proportional servo direction valve, the third proportional servo direction valve, the first electromagnetic directional valve, and the second electromagnetic directional valve are connected to the oil tank oil return port through an oil delivery pipe.

[0005] A high-pressure oil filter is arranged on the oil delivery pipe connected to the oil outlet of the oil tank; a return oil filter is arranged on the oil delivery pipe connected to the oil return port of the oil tank.

[0006] A pressure gauge and an electromagnetic overflow valve are arranged between the oil delivery pipe and the oil return pipe of the oil tank.

[0007] A first displacement sensor is arranged on the first oil cylinder; a second displacement sensor is arranged on the second oil cylinder.

[0008] A first stacked overflow valve is arranged between the first stacked hydraulic control check valve and the first oil cylinder; a second stacked overflow valve is arranged between the second stacked hydraulic control check valve and the second oil cylinder.

[0009] The third stacked pilot-operated check valve is connected to the synchronous flow dividing and collecting valve.

[0010] A first electromagnetic ball valve and a second electromagnetic ball valve are respectively arranged on two oil pipelines connecting the first oil cylinder and the third stacked pilot-operated check valve.

[0011] The fuel tank is provided with a liquid level and liquid temperature gauge, an air filter, and an oil suction filter.

[0012] Its beneficial effects are as follows: The structure of the utility model is reasonably and ingeniously designed, and it can enable the centering tooling of the welding machine to achieve precise control that takes into account both simultaneous actions and individual actions. Description of the Drawings

[0013] The utility model will be described by way of examples with reference to the accompanying drawings, where:

[0014] Figure 1 is a schematic structural diagram of the utility model. Detailed Embodiment

[0015] Now, the utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the utility model in a schematic way, so they only show the components related to the utility model.

[0016] In the description of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements; a fixed connection can be welding or bonding. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific situations.

[0018] Such as Figure 1The hydraulic system for a welding device shown in the figure includes an oil tank 1. The oil outlet of the oil tank 1 transports hydraulic oil through an oil delivery pipe to the first oil cylinder 15.1, the second oil cylinder 15.2, the lifting oil cylinder 13, and the centering oil cylinder 14 via a gear oil pump 6. The gear oil pump 6 is driven by an electric motor 7. On the oil delivery pipe connecting the oil tank 1 and the first oil cylinder 15.1, a first proportional servo direction valve 10.1 and a first stacked pilot-operated check valve 11.1 are provided. On the oil delivery pipe connecting the oil tank 1 and the second oil cylinder 15.2, a second proportional servo direction valve 10.2 and a second stacked pilot-operated check valve 11.2 are provided. The oil tank 1 is also connected to both the first oil cylinder 15.1 and the second oil cylinder 15.2 simultaneously through a third proportional servo direction valve 10.3 and a third stacked pilot-operated check valve 11.3. On the oil delivery pipe connecting the oil tank 1 and the lifting oil cylinder 13, a first electromagnetic directional valve 9.1, a first stacked throttle valve 18.1, and a fourth stacked pilot-operated check valve 11.4 are arranged in sequence. On the oil delivery pipe connecting the oil tank 1 and the centering oil cylinder 14, a second electromagnetic directional valve 9.2, a second stacked throttle valve 18.2, and a fifth stacked pilot-operated check valve 11.5 are arranged in sequence. The first proportional servo direction valve 10.1, the second proportional servo direction valve 10.2, the third proportional servo direction valve 10.3, the first electromagnetic directional valve 9.1, and the second electromagnetic directional valve 9.2 are connected to the oil return port of the oil tank 1 through an oil delivery pipe. The first stacked pilot-operated check valve 11.1, the second stacked pilot-operated check valve 11.2, the third stacked pilot-operated check valve 11.3, the first stacked throttle valve 18.1, and the second stacked throttle valve 18.2 act as hydraulic locks to achieve locking at any position of the oil cylinder.

[0019] A first stacked relief valve 16.1 is provided between the first stacked pilot-operated check valve 11.1 and the first oil cylinder 15.1; a second stacked relief valve 16.2 is provided between the second stacked pilot-operated check valve 11.2 and the second oil cylinder 15.2. The first stacked relief valve 16.1, the second stacked relief valve 16.2, the fourth stacked pilot-operated check valve 11.4, and the fifth stacked pilot-operated check valve 11.5 act as safety valves to prevent overpressure from damaging the workpiece.

[0020] The third stacked pilot-operated check valve 11.3 is connected to a synchronous flow dividing and collecting valve 12.

[0021] A high-pressure oil filter 22 is provided on the oil delivery pipe connected to the oil outlet of the oil tank 1; a return oil filter 5 is provided on the oil delivery pipe connected to the oil return port of the oil tank 1. The high-pressure oil filter 22 provides high-cleanliness hydraulic oil for the proportional system, which can improve the reliability of the system and extend the service life of components. The return oil filter 5 can prevent metal chips, seal fragments, and oil polymers generated during system operation from entering the oil tank and maintain the cleanliness of the system.

[0022] A pressure gauge 17 and an electromagnetic relief valve 8 are provided between the oil delivery pipe and the oil return pipe of the oil tank 1.

[0023] The first oil cylinder 15.1 is provided with a first displacement sensor 20.1; the second oil cylinder 15.2 is provided with a second displacement sensor 20.2.

[0024] First electromagnetic ball valves 21.1 and second electromagnetic ball valves 21.2 are respectively arranged on two oil pipelines connecting the first oil cylinder 15.1 and the third superimposed pilot-operated check valve 11.3.

[0025] The fuel tank 1 is provided with a liquid level and liquid temperature gauge 2, an air filter 3, and an oil suction filter 4, which can keep the pressure balance inside and outside the fuel tank and prevent impurities and moisture in the air from entering the fuel tank.

[0026] Embodiment 1

[0027] The first oil cylinder 15.1 and the second oil cylinder 15.2 act simultaneously to perform a simple conveying action:

[0028] The motor 7 is started, and the third proportional servo direction valve 10.3 controls the extension and retraction of the first oil cylinder and the second oil cylinder according to the control signal. At the same time, the first electromagnetic ball valve 21.1 and the second electromagnetic ball valve 21.2 are energized. At this time, the synchronization of the two oil cylinders is realized by the synchronous motor, and the displacement, speed and positioning of the oil cylinders are detected by the first displacement sensor 20.1 and the second displacement sensor 20.2 and controlled by the first proportional servo direction valve 10.1 and the second proportional servo direction valve 10.2.

[0029] Embodiment 2

[0030] The first oil cylinder 15.1 and the second oil cylinder 15.2 act simultaneously for precise control:

[0031] The motor 7 is started, and the first proportional servo direction valve 10.1 and the second proportional servo direction valve 10.2 respectively control the extension or retraction of the first oil cylinder 15.1 and the second oil cylinder 15.2 according to the control signal. At this time, the synchronization, displacement, speed and positioning control of the oil cylinders are detected by the first displacement sensor 20.1 and the second displacement sensor 20.2 and controlled by the first proportional servo direction valve 10.1 and the second proportional servo direction valve 10.2. Among them, the first displacement sensor 20.1 is used as the reference signal for control in the synchronous control, and the second displacement sensor 20.2 is used as the follow-up signal to respectively control the first proportional servo direction valve 10.1 and the second proportional servo direction valve 10.2, so as to realize the precise control of the displacement, speed and positioning of the double cylinders.

[0032] Embodiment 3

[0033] Single cylinder action:

[0034] The motor 7 starts, and the first proportional servo directional valve 10.1 or the second proportional servo directional valve 10.2 achieves precise control of speed and position according to the signals detected by the first displacement sensor 20.1 or the second displacement sensor 20.2.

[0035] The structure design of the present utility model is reasonable and ingenious, enabling the centering tooling of the welding machine to achieve precise control that takes into account both simultaneous actions and individual actions.

[0036] Based on the inspiration of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulic system for welding equipment, characterized in that: The invention comprises an oil tank (1), wherein the oil outlet of the oil tank (1) transports hydraulic oil to a first oil cylinder (15.1), a second oil cylinder (15.2), a lifting oil cylinder (13) and a centering oil cylinder (14) through an oil delivery pipe via a gear oil pump (6), and the gear oil pump (6) is driven by an electric motor (7); a first proportional servo directional valve (10.1) and a first superimposed hydraulically controlled non-return valve (11.1) are arranged on the oil delivery pipe connecting the oil tank (1) and the first oil cylinder (15.1); a second proportional servo directional valve (10.2) and a second superimposed hydraulically controlled non-return valve (11.2) are arranged on the oil delivery pipe connecting the oil tank (1) and the second oil cylinder (15.2); the oil tank (1) also transports hydraulic oil to a first oil cylinder (15.1), a second oil cylinder (15.2), and a second superimposed hydraulically controlled non-return valve (11.2) through a third proportional servo directional valve (10.3) and a third superimposed hydraulically controlled non-return valve (11.3) at the same time. The first oil cylinder (15.1) and the second oil cylinder (15.2) are connected at the same time; the first electromagnetic reversing valve (9.1), the first superimposed throttle valve (18.1) and the fourth superimposed hydraulic control non-return valve (11.4) are sequentially arranged on the oil pipeline connecting the oil tank (1) and the lifting oil cylinder (13); the second electromagnetic reversing valve (9.2), the second superimposed throttle valve (18.2) and the fifth superimposed hydraulic control non-return valve (11.5) are sequentially arranged on the oil pipeline connecting the oil tank (1) and the centering oil cylinder (14); the first proportional servo directional valve (10.1), the second proportional servo directional valve (10.2), the third proportional servo directional valve (10.3), the first electromagnetic reversing valve (9.1) and the second electromagnetic reversing valve (9.2) are connected to the oil return port of the oil tank (1) through the oil pipeline.

2. The hydraulic system for welding equipment according to claim 1, characterized in that: A high-pressure oil filter (22) is provided on the oil pipeline connected to the oil outlet of the oil tank (1); and an oil return filter (5) is provided on the oil pipeline connected to the oil return port of the oil tank (1).

3. The hydraulic system for welding equipment according to claim 1, characterized in that: A pressure gauge (17) and an electromagnetic overflow valve (8) are provided between the oil outlet pipe and the oil return pipe of the oil tank (1).

4. The hydraulic system for welding equipment according to claim 1, characterized in that: The first oil cylinder (15.1) is provided with a first displacement sensor (20.1); the second oil cylinder (15.2) is provided with a second displacement sensor (20.2).

5. The hydraulic system for welding equipment according to claim 1, characterized in that: A first stacked overflow valve (16.1) is provided between the first stacked hydraulically controlled one-way valve (11.1) and the first oil cylinder (15.1); and a second stacked overflow valve (16.2) is provided between the second stacked hydraulically controlled one-way valve (11.2) and the second oil cylinder (15.2).

6. The hydraulic system for welding equipment according to claim 1, characterized in that: The third superimposed hydraulically controlled one-way valve (11.3) is connected to the synchronous flow dividing and combining valve (12).

7. The hydraulic system for welding equipment according to claim 1, characterized in that: A first electromagnetic ball valve (21.1) and a second electromagnetic ball valve (21.2) are respectively arranged on two oil delivery pipes connecting the first oil cylinder (15.1) and the third superimposed hydraulically controlled one-way valve (11.3).

8. The hydraulic system for welding equipment according to claim 1, characterized in that: The oil tank (1) is provided with a liquid level and liquid temperature gauge (2), an air filter (3), and an oil suction filter (4).

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