Solid phase friction welding mobile component hydraulic control system

Abstract

The present application relates to a kind of solid phase friction welding mobile components hydraulic control system, including two hydraulic pumps parallel connection double pump oil supply system, two pumps are respectively connected with one overflow valve, the oil way of two pumps is connected with one check valve in middle, low-pressure pump is connected with one two-position four-way electromagnetic reversing valve in middle, booster is directly connected with top forging hydraulic cylinder.High-pressure pump is respectively connected with one two-position four-way electromagnetic reversing valve and one two-position four-way manual reversing valve, wherein two-position four-way electromagnetic reversing valve is directly connected with top forging hydraulic cylinder, two-position four-way manual reversing valve is directly connected with clamping hydraulic cylinder, while one sequence valve is connected with one check valve in parallel, then with manual reversing valve and one three-position four-way electromagnetic reversing valve, three-position four-way electromagnetic reversing valve is directly connected with feed hydraulic cylinder.The present application uses low-pressure pump and booster to generate high pressure to supplement top forging force, then oil supply with high-pressure pump to carry out top forging, using such way can effectively reduce the working pressure of high-pressure pump, reduce production and maintenance cost.

Description

Technical Field

[0001] This invention relates to a hydraulic control system for a solid-state friction welding moving component. Background Technology

[0002] To address the insufficient upsetting force of current inertial friction welding machines in China, directly using foreign high-pressure, high-flow pumps would be too costly and technically unsupported. Therefore, this invention designs a dual-pump oil supply system. A low-pressure pump is connected to a booster to generate high pressure to supplement the upsetting force, and then it supplies oil together with the high-pressure pump for upsetting. This method can effectively reduce the working pressure of the high-pressure pump and reduce production and maintenance costs. Summary of the Invention

[0003] The technical problem to be solved by the invention is to provide a hydraulic control system for solid-phase friction welding moving parts that is low in cost, energy-saving, and can meet the upsetting force requirements.

[0004] The technical solution adopted in this invention is as follows:

[0005] A hydraulic control system for a solid-state friction welding moving component includes a filter 1, a low-pressure high-flow pump 2, a high-pressure low-flow pump 4, a first check valve 18.1, a second check valve 18.2, a two-position four-way solenoid directional valve 8, a two-position four-way manual directional valve 12, a three-position four-way solenoid directional valve 14, a sequence valve 13, a booster 9, an upsetting hydraulic cylinder 10, a feed hydraulic cylinder 15, a clamping hydraulic cylinder 16, a first relief valve 6, and a second relief valve 7.

[0006] Low-pressure pump 2 is driven by electric motor 3, and high-pressure pump 4 is driven by electric motor 5. High-pressure pump 4 is connected to filter 1, and the two pumps are connected in parallel to form a dual-pump oil supply system. Low-pressure pump 2 is connected to relief valve 6 separately, and high-pressure pump 4 is connected to relief valve 7 separately. The oil circuits from the two pumps are connected by check valve 18.1. Low-pressure pump 2 is connected to booster 9 by a two-position four-way solenoid directional valve 8, and booster 9 is directly connected to upsetting hydraulic cylinder 10. High-pressure pump 4 is connected to a two-position four-way solenoid valve. A directional control valve 11 and a two-position four-way manual directional control valve 12 are provided. The two-position four-way solenoid directional control valve 11 is directly connected to the upsetting hydraulic cylinder 10, and the two-position four-way manual directional control valve 12 is directly connected to the clamping hydraulic cylinder 16. A pressure gauge 17 is connected to the return oil line of the clamping cylinder 16. At the same time, a sequence valve 13 and a check valve 18.2 are connected in parallel and then connected to the manual directional control valve 12 and a three-position four-way solenoid directional control valve 14. The three-position four-way solenoid directional control valve 14 is directly connected to the feed hydraulic cylinder 15.

[0007] The low-pressure pump 2 and the booster 9 are connected by a two-position four-way solenoid directional valve 8. The booster 9 is directly connected to the upsetting hydraulic cylinder 10. The working principle of the booster 9 is to obtain high pressure by using the difference in the effective area of ​​the two pistons. Low-pressure oil is input into the large piston side of the booster 9. According to the principle of force balance, high-pressure oil must be obtained on the small piston side to generate high pressure to supplement the upsetting force. Then, together with the high-pressure pump 4, it supplies oil to the upsetting hydraulic cylinder 10 to achieve the purpose of upsetting.

[0008] The low-pressure pump 2 sucks oil and opens the one-way valve 18.1 to supply oil together with the high-pressure pump 4. The oil is supplied to the clamping hydraulic cylinder 16 through the two-position four-way manual directional valve 12 to generate clamping force. The clamping force is read by the pressure gauge 17.

[0009] The feedback control of the clamping force is generated by the sequence valve 13 and the check valve 18.2 connected in parallel to the oil inlet of the clamping cylinder 16. The set value of the sequence valve 13 is greater than that of the pressure gauge 17, ensuring that the pressure continues to increase after the workpiece is clamped before the sequence valve 13 can be opened, thereby connecting the three-position four-way solenoid directional valve 14.

[0010] The three-position four-way solenoid directional valve 14 is connected to the feed hydraulic cylinder 15. When the sequence valve 13 is opened, the workpiece can be rapidly advanced by forming a differential connection through the P-type center position function. The left position solenoid is energized to achieve working feed, and the right position solenoid is energized to achieve rapid retraction.

[0011] Working principle of the invention

[0012] Low-pressure pump 2, driven by motor 3, draws oil, while high-pressure pump 4, driven by motor 5, draws oil through filter 1. Low-pressure pump 2 is connected to the forward inlet of check valve 18.1, and high-pressure pump 4 is connected to the reverse inlet of check valve 18.1. Pressing the manual directional valve 12 switches it to the left position. Oil from both low-pressure pump 2 and high-pressure pump 4 flows together through the left-position channel to the left chamber of clamping cylinder 16, and the workpiece begins to be clamped. The clamping force is determined by pressure gauge 17. Continuing oil supply causes the pressure in the left chamber of the clamping cylinder to rise continuously. When the set pressure of hydraulic sequence valve 13 is reached, the valve core is opened, connecting the feed oil circuit to the main oil circuit. Initially, the three-position four-way solenoid directional valve 14 is in the neutral position, forming a differential connection with the feed hydraulic cylinder 15, at which point the workpiece maintains rapid feed. When the left-position solenoid of the three-position four-way solenoid directional valve 14 is energized, the solenoid directional valve switches to the left position, at which point the workpiece maintains working feed. When the right-position solenoid of the three-position four-way solenoid directional valve 14 is energized, the solenoid directional valve switches to the right position, at which point the workpiece retracts rapidly. When the feed hydraulic cylinder retracts to the leftmost position, the manual directional valve 12 is pressed again, the spring resets, the manual directional valve switches to the right position, oil begins to enter the right side of the clamping hydraulic cylinder, and the workpiece is released. The upsetting system consists of a low-pressure pump, a booster, and a high-pressure pump. Initially, both solenoid directional valves 8 and 11 are in the right-hand position, reset by springs. When solenoid valve 8 is energized in the left-hand position, it switches to the left position, and oil supplied by low-pressure pump 2 enters the left chamber of booster 9 through the left-hand channel. The booster generates high-pressure oil that flows to the left chamber of upsetting hydraulic cylinder 10. Simultaneously, the left-hand solenoid of solenoid valve 11 is energized, switching to the left-hand position, and high-pressure oil from high-pressure pump 4 flows through the left-hand channel into the left chamber of upsetting hydraulic cylinder 10. Then, the high-pressure oil generated by booster 9 and the high-pressure oil supplied by high-pressure pump 4 begin the upsetting operation. After upsetting is completed, both solenoid valves 8 and 11 are de-energized and reset by springs, switching to the right-hand position. At this time, hydraulic oil enters the middle chamber of booster 9 and the right chamber of upsetting hydraulic cylinder 10 respectively to achieve retraction and reset. In this way, the entire system completes one working cycle.

[0013] Invention Effects

[0014] This invention designs a hydraulic control system for a solid-state friction welding moving component. It utilizes a low-pressure pump connected to a booster to generate high pressure to supplement the upsetting force, which is then supplied with oil along with the high-pressure pump for upsetting. This effectively reduces the working pressure of the high-pressure pump, thus lowering production and maintenance costs. Simultaneously, this invention employs a clamping force feedback mechanism, implemented by a sequence valve and a check valve connected in parallel. The sequence valve's setpoint is higher than the pressure gauge reading, ensuring that the sequence valve only opens after the workpiece is clamped, thereby connecting a three-position four-way solenoid directional valve to achieve sequential control. This invention also uses a three-position four-way solenoid directional valve with a P-type center position function connected to the feed hydraulic cylinder. When the sequence valve opens, the center position function forms a differential connection to achieve rapid workpiece advance. Energizing the left solenoid achieves the working feed, and energizing the right solenoid achieves the rapid retraction stroke. Attached Figure Description

[0015] Figure 1 This is a hydraulic schematic diagram of the present invention.

[0016] In the diagram, 1-Filter, 2-Low-pressure high-flow pump, 3-Motor, 4-High-pressure low-flow pump, 5-Motor, 6-Relief valve, 7-Relief valve, 8-Two-position four-way solenoid directional valve, 9-Booster, 10-Upsetting hydraulic cylinder, 11-Two-position four-way solenoid directional valve, 12-Manual directional valve, 13-Sequence valve, 14-Three-position four-way solenoid directional valve, 15-Feed hydraulic cylinder, 16-Clamping hydraulic cylinder, 17-Pressure gauge, 18.1-Check valve, 18.2-Check valve. Detailed Implementation

[0017] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0018] like Figure 1 As shown, the present invention includes a filter 1, a low-pressure high-flow pump 2, a high-pressure low-flow pump 4, a first check valve 18.1, a second check valve 18.2, a two-position four-way solenoid directional valve 8, a two-position four-way manual directional valve 12, a three-position four-way solenoid directional valve 14, a sequence valve 13, a booster 9, an upsetting hydraulic cylinder 10, a feed hydraulic cylinder 15, a clamping hydraulic cylinder 16, a first relief valve 6, and a second relief valve 7.

[0019] Low-pressure pump 2 is driven by electric motor 3, and high-pressure pump 4 is driven by electric motor 5. High-pressure pump 4 is connected to filter 1, and the two pumps are connected in parallel to form a dual-pump oil supply system. Low-pressure pump 2 is connected to relief valve 6 separately, and high-pressure pump 4 is connected to relief valve 7 separately. The oil circuits from the two pumps are connected by check valve 18.1. Low-pressure pump 2 is connected to booster 9 by a two-position four-way solenoid directional valve 8, and booster 9 is directly connected to upsetting hydraulic cylinder 10. High-pressure pump 4 is connected to a two-position four-way solenoid valve. A directional control valve 11 and a two-position four-way manual directional control valve 12 are provided. The two-position four-way solenoid directional control valve 11 is directly connected to the upsetting hydraulic cylinder 10, and the two-position four-way manual directional control valve 12 is directly connected to the clamping hydraulic cylinder 16. A pressure gauge 17 is connected to the return oil line of the clamping cylinder 16. At the same time, a sequence valve 13 and a check valve 18.2 are connected in parallel and then connected to the manual directional control valve 12 and a three-position four-way solenoid directional control valve 14. The three-position four-way solenoid directional control valve 14 is directly connected to the feed hydraulic cylinder 15.

[0020] Manually press the directional valve 12. The directional valve 12 switches to the left position. At this time, the oil inlet circuit is connected to the left chamber of the clamping hydraulic cylinder 16, and the oil return circuit is connected to the oil chamber of the clamping hydraulic cylinder 16. The oil from the low-pressure pump 2 and the high-pressure pump 4 flows together through the left position channel to the left chamber of the clamping cylinder 16, and the workpiece begins to be clamped. The clamping force is determined by the pressure gauge 17. Continue to supply oil, and the pressure in the left chamber of the clamping cylinder continues to rise. When it reaches the set pressure of the hydraulic sequence valve 13, the valve core is pushed open, and the feed oil circuit is connected to the main oil circuit. At the beginning, the three-position four-way solenoid directional valve 14 is in the middle position, forming a differential connection with the feed hydraulic cylinder 15. At this time, the workpiece is fed rapidly. When the left position solenoid of the three-position four-way solenoid directional valve 14 is energized, the solenoid... When the directional valve switches to the left position, the workpiece continues its feed. The next action involves upsetting the workpiece. The upsetting system uses a low-pressure pump connected to a booster to generate high pressure to supplement the upsetting force, which is then supplied with oil along with the high-pressure pump. Initially, the solenoid directional valve 11 is not energized and is in the right position due to spring reset. Its inlet oil path connects to the right chamber of the upsetting hydraulic cylinder 10, and its return oil path connects to the left chamber. The solenoid directional valve 8 is also not energized and is in the right position due to spring reset. Its inlet oil path connects to the middle chamber of the booster 9, and its return oil path connects to the left chamber of the booster 9. At this time, both the upsetting hydraulic cylinder 10 and the booster 9 are in their leftmost starting positions. When the solenoid directional valve 8 is energized to the left position, it switches to the left position, and the feed... The oil circuit is connected to the left chamber of the booster 9. Low-pressure pump 2 supplies oil through the left-position channel into the left chamber of the booster 9. The booster generates high-pressure oil, which is output to the left chamber of the upsetting hydraulic cylinder 10, pushing the cylinder to the right for upsetting. Simultaneously, the left-position electromagnet of the solenoid directional valve 11 is energized, switching to the left position. The oil inlet circuit is connected to the left chamber of the upsetting hydraulic cylinder 10. High-pressure oil from the high-pressure pump 4 flows through the left-position channel into the left chamber of the upsetting hydraulic cylinder 10, pushing the cylinder to the right for upsetting. After upsetting is completed, the solenoid directional valve 11 is de-energized, the spring returns, and the cylinder switches to the right position. The oil inlet circuit connects to the right chamber of the upsetting hydraulic cylinder 10, and the return circuit connects to the left chamber of the upsetting hydraulic cylinder 10. The solenoid directional valve 8 is de-energized, and the spring returns... When operating in the right position, the oil inlet circuit is connected to the middle chamber of the booster 9, and the oil return circuit is connected to the left chamber of the booster 9. At this time, both the upsetting hydraulic cylinder 10 and the booster 9 return to their initial positions. After upsetting is completed, the workpiece begins to retract. The right-position solenoid of the three-position four-way solenoid directional valve 14 is energized, and the solenoid directional valve 14 switches to the right position. At this time, the oil inlet circuit is connected to the right chamber of the feed hydraulic cylinder 15, and the oil return circuit is connected to the left chamber, causing the workpiece to retract rapidly. After the feed hydraulic cylinder 15 has retracted completely, the manual directional valve 12 is pressed again. The spring-reset manual directional valve 12 switches to the right position, connecting the right chamber of the clamping hydraulic cylinder 16 to the oil inlet circuit and the left chamber to the oil return circuit. The system supplies oil into the right chamber and returns it to the oil tank from the left chamber, releasing the workpiece. At this point, the entire system has completed one working cycle.

Claims

1. A hydraulic control system for a solid-state friction welding moving component, characterized in that... The low-pressure pump (2) is driven by the first electric motor (3), and the high-pressure pump (4) is driven by the second electric motor (5). The high-pressure pump (4) is connected to the filter (1), and the two pumps are connected in parallel to form a dual-pump oil supply system. The low-pressure pump (2) is connected separately to the first relief valve (6), and the high-pressure pump (4) is connected separately to the second relief valve (7). The oil circuits from the two pumps are connected by the first check valve (18.1). The low-pressure pump (2) is connected to the booster (9) by the first two-position four-way solenoid directional valve (8), and the booster (9) is directly connected to the upsetting hydraulic cylinder (10). The high-pressure pump (4) is connected to the second two-position four-way solenoid directional valve (11) and the two-position four-way manual directional valve (12) respectively. The second two-position four-way solenoid directional valve (11) is directly connected to the upsetting hydraulic cylinder (10). The two-position four-way manual directional valve (12) is directly connected to the clamping hydraulic cylinder (16), and a pressure gauge (17) is connected to the return oil line of the clamping hydraulic cylinder (16); a sequence valve (13) is connected in parallel with the second check valve (18.2) and then connected to the two-position four-way manual directional valve (12) and the three-position four-way solenoid directional valve (14), and the three-position four-way solenoid directional valve (14) is directly connected to the feed hydraulic cylinder (15); the control process sequence of the hydraulic system for solid phase friction welding moving parts is as follows: the low-pressure pump (2) is driven by the first motor (3) to suck oil, the high-pressure pump (4) is driven by the second motor (5) to suck oil through the filter (1), the low-pressure pump (2) is connected to the positive oil inlet of the first check valve (18.1), and the high-pressure pump (4) is connected to the first check valve (18.1).1) Reverse oil port; Press the two-position four-way manual directional valve (12), the two-position four-way manual directional valve (12) switches to the left position, the oil from the low-pressure pump (2) and the high-pressure pump (4) flows together through the left position channel to the left chamber of the clamping hydraulic cylinder (16), the workpiece begins to be clamped, the clamping force is determined by the pressure gauge (17); continue to supply oil, the pressure in the left chamber of the clamping hydraulic cylinder (16) continues to rise, when it reaches the set pressure of the hydraulic sequence valve (13), the valve core is pushed open, the feed oil circuit is connected to the main oil circuit; at the beginning, the three-position four-way solenoid directional valve (14) In the middle position, a differential connection is formed with the feed hydraulic cylinder (15), at which time the workpiece is kept feeding rapidly; when the left position solenoid of the three-position four-way solenoid valve (14) is energized, it switches to the left position, at which time the workpiece is kept feeding; when the right position solenoid of the three-position four-way solenoid valve (14) is energized, it switches to the right position, at which time the workpiece is quickly retracted; when the feed hydraulic cylinder (15) retracts to the leftmost position, the two-position four-way manual directional valve (12) is pressed again, the spring is reset, the two-position four-way manual directional valve (12) switches to the right position, the right side of the clamping hydraulic cylinder starts to receive oil, and the workpiece is released; The upsetting system is implemented by a low-pressure pump (2), a booster (9), and a high-pressure pump (4). Initially, the first and second position four-way solenoid directional valves (8 and 11) are both in the right position by spring reset. When the first and second position four-way solenoid directional valve (8) is energized in the left position, it switches to the left position. The low-pressure pump (2) supplies oil through the left position channel into the left chamber of the booster (9), and the booster (9) generates high-pressure oil that flows to the left chamber of the upsetting hydraulic cylinder (10). At the same time, the second and second position four-way solenoid directional valve (11)... When the left-position electromagnet is energized, the system switches to the left-position operation. High-pressure oil from the high-pressure pump (4) flows through the left-position channel into the left chamber of the upsetting hydraulic cylinder (10). Then, the high-pressure oil generated by the booster (9) and the high-pressure oil supplied by the high-pressure pump (4) begin the upsetting operation. After upsetting is completed, the first and second-position four-way solenoid valves (8 and 11) are de-energized and reset by springs, switching to the right-position operation. At this time, hydraulic oil enters the middle chamber of the booster (9) and the right chamber of the upsetting hydraulic cylinder (10) respectively to achieve retraction and reset, completing one cycle of the control process.

2. The hydraulic control system for a solid-state friction welding moving component according to claim 1, characterized in that... The low-pressure pump (2) and the booster (9) are connected by a first and second position four-way solenoid directional valve (8). The booster (9) is directly connected to the upsetting hydraulic cylinder (10). Low-pressure oil is input on the large piston side of the booster (9). According to the principle of force balance, high-pressure oil must be obtained on the small piston side to generate high pressure to supplement the upsetting force. Then, together with the high-pressure pump (4), oil is supplied to the upsetting hydraulic cylinder (10) to achieve the purpose of upsetting.

3. The hydraulic control system for a solid-state friction welding moving component according to claim 1, characterized in that... The low-pressure pump (2) draws oil and opens the first check valve (18.1) together with the high-pressure pump (4) to supply oil. The oil is supplied to the clamping hydraulic cylinder (16) through the two-position four-way manual directional valve (12) to generate clamping force. The clamping force is determined by the pressure gauge (17).

4. The hydraulic control system for a solid-state friction welding moving component according to claim 3, characterized in that... The clamping force feedback is generated by the sequence valve (13) and the second check valve (18.2) connected in parallel to the oil inlet of the clamping hydraulic cylinder (16). The set value of the sequence valve (13) is greater than that of the pressure gauge (17) to ensure that the pressure continues to increase after the workpiece is clamped before the sequence valve (13) can be opened, thereby connecting the three-position four-way solenoid directional valve (14).

5. A hydraulic control system for a solid-state friction welding moving component according to claim 4, characterized in that... The P-type center position function connects the three-position four-way solenoid directional valve (14) to the feed hydraulic cylinder (15). When the sequence valve (13) is opened, the workpiece can be rapidly advanced by forming a differential connection through the center position function. The left position solenoid is energized to achieve the working feed, and the right position solenoid is energized to achieve the rapid return stroke.

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