Hydraulic system for constant-seam pressing of carbon fiber prepreg

Abstract

The utility model provides a hydraulic system for constant-gap pressing of carbon fiber prepreg, which belongs to the technical field of roll gap adjustment and comprises a frame and a hydraulic mechanism. The rack comprises a cross beam and two longitudinal beams, the cross beam is fixed to the tops of the two longitudinal beams, a movable roller and a fixed roller are horizontally installed between the two longitudinal beams from top to bottom, and a roller gap is formed between the movable roller and the fixed roller; the hydraulic mechanism comprises two hydraulic cylinders installed on the tops of the two longitudinal beams respectively, piston rods on the lower portions of the hydraulic cylinders are connected with roller shafts on the same side of the movable roller, and the two hydraulic cylinders jointly drive the movable roller to ascend and descend through the piston rods so as to adjust the size of the roller gap. According to the hydraulic system for constant-seam pressing of the carbon fiber prepreg, accurate pressure control or high-precision position control can be achieved, and the adjusting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller gap adjustment, and more specifically relates to a hydraulic system for constant-gap pressing of carbon fiber prepregs. Background Art

[0002] At present, the main methods for adjusting the roller gap of the carbon fiber prepreg production pressing mechanism are the screw mechanism, the wedge adjustment mechanism, and the cylinder mechanism.

[0003] Disadvantages of the three current roller gap adjustment methods:

[0004] (1) The screw-roll gap adjustment mechanism has a motor-driven screw or a manually installed screw to adjust the roll gap. The accuracy of the screw itself causes poor roll gap accuracy, and it also requires a lot of time for personnel to debug the roll gap;

[0005] (2) The cylinder roll gap adjustment mechanism adjusts the roll gap by controlling the solenoid valve to change the direction of the cylinder. Due to the compressibility and expansion of the gas, the roll gap adjustment accuracy of this method is poor;

[0006] (3) Compared with the screw roller gap adjustment mechanism and the cylinder roller gap adjustment machine, the wedge iron gap adjustment mechanism has a higher roller gap adjustment accuracy, which can reach ±1μm. However, the wedge iron gap adjustment mechanism requires a lot of debugging time during the adjustment process, which is time-consuming and labor-intensive, resulting in a waste of economic benefits. Utility Model Content

[0007] The purpose of the utility model is to provide a hydraulic system for constant seam pressing of carbon fiber prepreg, which can realize precise pressure control or high-precision position control and improve regulation efficiency.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a hydraulic system for constant seam pressing of carbon fiber prepreg, comprising:

[0009] A frame, wherein the frame includes a crossbeam and two longitudinal beams, the crossbeam is fixed to the top of the two longitudinal beams, and a movable roller and a fixed roller are horizontally installed from top to bottom between the two longitudinal beams, and a roller gap is formed between the movable roller and the fixed roller;

[0010] A hydraulic mechanism includes two hydraulic cylinders respectively installed on the top of the two longitudinal beams, the piston rods at the lower parts of the hydraulic cylinders are connected to the roller shafts on the same side of the movable rollers, and the two hydraulic cylinders jointly drive the movable rollers to rise and fall through the piston rods to adjust the size of the roller gap.

[0011] In one possible implementation, the hydraulic mechanism also includes an oil supply line and an oil return line, the oil supply line includes a main oil supply line and two first branch lines, the two first branch lines are connected in parallel with the main oil supply line, a power unit is provided at the end of the main oil supply line, the two first branch lines are respectively connected to the two hydraulic cylinders, a shut-off valve, a first pressure sensor and a displacement sensor are sequentially provided on the first branch line, the oil return line includes a main oil return line and two second branch lines, the two second branch lines are connected in parallel with the main oil return line, and the second branch line is sequentially provided with a second pressure sensor and a first one-way valve.

[0012] In a possible implementation, the power unit includes a motor and a pump that are sequentially arranged on the main oil supply line.

[0013] In a possible implementation, a second one-way valve and a first filter are sequentially provided on the main oil supply line.

[0014] In a possible implementation, a first accumulator is further provided on the first branch line, and the first accumulator is located in front of the stop valve.

[0015] In a possible implementation, a cooler and a second filter are sequentially provided on the oil return line.

[0016] In one possible implementation, a servo valve is connected to the first branch line and the second branch line connecting the same hydraulic cylinder. The servo valve is located between the shut-off valve and the first pressure sensor of the first branch line, and the servo valve is located between the second pressure sensor and the first one-way valve of the second branch line.

[0017] In a possible implementation, a first overflow valve is further connected to the first branch line and the second branch line connected to the same hydraulic cylinder.

[0018] In a possible implementation, a communication line is connected between the oil supply main line and the oil return main line, and a second pressure sensor, a pressure gauge, a second accumulator, and a second overflow valve are sequentially provided on the communication line.

[0019] The beneficial effect of the hydraulic system for constant seam pressing of carbon fiber prepregs provided by the utility model is that: compared with the existing technology, a movable roller and a fixed roller are horizontally installed between the two longitudinal beams of the frame, and a roller gap is formed between the movable roller and the fixed roller. The two hydraulic cylinders of the hydraulic mechanism are respectively installed on the top of the longitudinal beam, and the piston rods at the lower part of the hydraulic cylinders extend or shorten at the same time, thereby driving the movable roller to descend or ascend, and finally achieving the purpose of adjusting the roller gap. Compared with the screw structure and the cylinder structure, the use of hydraulic cylinders to adjust the roller gap has higher adjustment accuracy and shorter debugging time than the wedge structure. The hydraulic system for constant seam pressing of carbon fiber prepregs provided by the utility model can achieve precise pressure control or high-precision position control, thereby improving adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of a hydraulic system for constant seam pressing of carbon fiber prepregs provided by the present invention;

[0022] Figure 2 This is an oil circuit diagram of a hydraulic system for constant seam pressing of carbon fiber prepreg provided by the utility model;

[0023] Figure 3 The oil circuit diagram of the piston rod in the extended state provided by the utility model;

[0024] Figure 4 This is the oil circuit diagram of the piston rod in the shortened state provided by the utility model.

[0025] In the picture:

[0026] 100, frame; 200, movable roller; 300, fixed roller; 400, hydraulic mechanism;

[0027] 1. Motor; 2. Pump; 3. Hydraulic cylinder; 4. Stop valve; 5. First pressure sensor; 6. Displacement sensor; 7. Second pressure sensor; 8. First one-way valve; 9. Second one-way valve; 10. First filter; 11. First accumulator; 12. Cooler; 13. Second filter; 14. Servo valve; 15. First relief valve; 16. Third pressure sensor; 17. Pressure gauge; 18. Second accumulator; 19. Second relief valve. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Unless otherwise explicitly defined, the use of terms such as "first," "second," or "third," etc., are intended to distinguish different objects rather than to describe a specific order.

[0030] Unless otherwise expressly defined, directional words such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, so they cannot be understood as limiting the specific scope of protection of the present invention.

[0031] See also Figure 1 Now, a hydraulic system for constant seam pressing of carbon fiber prepreg provided by the present invention is described. A hydraulic system for constant seam pressing of carbon fiber prepreg, comprising a frame 100 and a hydraulic mechanism 400. The frame 100 comprises a crossbeam and two longitudinal beams, the crossbeam being fixed to the tops of the two longitudinal beams, a movable roller 200 and a fixed roller 300 being horizontally installed from top to bottom between the two longitudinal beams, a roller gap being formed between the movable roller 200 and the fixed roller 300; the hydraulic mechanism 400 comprises two hydraulic cylinders 3 respectively installed on the tops of the two longitudinal beams, the piston rod at the bottom of the hydraulic cylinder 3 being connected to the roller shaft on the same side of the movable roller 200, and the two hydraulic cylinders 3 jointly drive the movable roller 200 to rise and fall through the piston rod to adjust the size of the roller gap.

[0032] The present invention provides a hydraulic system for constant-seam pressing of carbon fiber prepregs. Compared with the prior art, a movable roller 200 and a fixed roller 300 are horizontally installed between the two longitudinal beams of the frame 100, and a roller gap is formed between the movable roller 200 and the fixed roller 300. The two hydraulic cylinders 3 of the hydraulic mechanism 400 are respectively installed on the top of the longitudinal beams, and the piston rods at the lower parts of the hydraulic cylinders 3 are extended or shortened at the same time, thereby driving the movable roller 200 to descend or ascend, and finally achieving the purpose of adjusting the roller gap. Compared with the screw structure and the cylinder structure, the roller gap is adjusted by the hydraulic cylinder 3, and the adjustment accuracy is higher, and the debugging time is shorter than the wedge structure. The present invention provides a hydraulic system for constant-seam pressing of carbon fiber prepregs, which can achieve precise pressure control or high-precision position control, thereby improving the adjustment efficiency.

[0033] See also Figure 2 The hydraulic mechanism 400 also includes an oil supply line and an oil return line. The oil supply line includes a main oil supply line and two first branch lines. The two first branch lines are connected in parallel to the main oil supply line. A power unit is provided at the end of the main oil supply line. The two first branch lines are respectively connected to two hydraulic cylinders 3. A shut-off valve 4, a first pressure sensor 5 and a displacement sensor 6 are sequentially provided on the first branch line. The oil return line includes a main oil return line and two second branch lines. The two second branch lines are connected in parallel to the main oil return line. A second pressure sensor 7 and a first one-way valve 8 are sequentially provided on the second branch line.

[0034] The same hydraulic cylinder 3 is connected to a first branch line and a second branch line respectively. The first branch line and the second branch line are used for oil supply and oil return respectively, thereby achieving the extension or shortening of the piston rod of the hydraulic cylinder 3 .

[0035] The power unit comprises a motor 1 and a pump 2 which are sequentially arranged on the main oil supply line to provide hydraulic power and output flow and pressure in real time.

[0036] A second one-way valve 9 and a first filter 10 are sequentially provided on the main oil supply line. The second one-way valve 9 can realize one-way oil supply and filter the oil with the help of the first filter 10.

[0037] A first accumulator 11 is further provided on the first branch line. The first accumulator 11 is located in front of the stop valve 4 and can form compression energy or potential energy on the first branch line and store it.

[0038] A cooler 12 and a second filter 13 are sequentially provided on the oil return line to cool and filter the discharged oil.

[0039] A servo valve 14 is connected to the first and second branch lines connecting the same hydraulic cylinder 3. This valve is located between the shutoff valve 4 and the first pressure sensor 5 in the first branch line, and between the second pressure sensor 7 and the first check valve 8 in the second branch line. Servo valve 14 has terminals A and B on one side and terminals P and T on the other. When servo valve 14P-A and BT are open, the piston rod of hydraulic cylinder 3 extends. When servo valve 14P-B and AT are open, hydraulic cylinder 3 retracts.

[0040] In addition, a first relief valve 15 is connected to the first branch line and the second branch line connecting the same hydraulic cylinder 3. A connecting line is connected between the main oil supply line and the main oil return line. The connecting line is sequentially provided with a third pressure sensor 16, a pressure gauge 17, a second accumulator 18, and a second relief valve 19.

[0041] For details, please refer to Figure 3 and Figure 4, motor 1 drives pump 2 to operate and output high-pressure hydraulic oil, which passes through the second one-way valve 9 and the first filter 10; the stop valve 4 is energized, the servo valve 14 is energized, the system pressure is set through the first relief valve 15, and the third pressure sensor 16 and the pressure gauge 17 read the system pressure.

[0042] When shutoff valve 4 (solenoid directional control valve) is energized, servo valves 14P-A, BT are connected, the piston rod of hydraulic cylinder 3 extends, displacement sensor 6 detects the extension displacement of the piston rod, and the first pressure sensor 5 and second pressure sensor 7 read the pressure values ​​in chambers A and B of hydraulic cylinder 3, respectively. Servo valves 14P-B, AT are connected, the piston rod of hydraulic cylinder 3 retracts, displacement sensor 6 detects the extension displacement of the piston rod, and the first pressure sensor 5 and second pressure sensor 7 read the pressure values ​​in chambers A and B of hydraulic cylinder 3, respectively. The roll gap is adjusted by high-frequency switching of servo valve 14 to adjust the extension and retraction of hydraulic cylinder 3, thereby changing the roll gap.

[0043] The constant gap pressing hydraulic system can adjust the roller gap quickly and efficiently, with the characteristics of high precision (accuracy can reach 0.1μm), high response, easy adjustment, and short debugging time. It ensures high-precision roller gap and improves product thickness consistency.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic system for constant seam pressing of carbon fiber prepreg, characterized in that: include: A frame (100), the frame (100) comprising a crossbeam and two longitudinal beams, the crossbeam being fixed to the tops of the two longitudinal beams, a movable roller (200) and a fixed roller (300) being horizontally installed from top to bottom between the two longitudinal beams, a roller gap being formed between the movable roller (200) and the fixed roller (300); A hydraulic mechanism (400) includes two hydraulic cylinders (3) respectively mounted on the tops of the two longitudinal beams, piston rods at the lower portions of the hydraulic cylinders (3) are connected to roller shafts on the same side of the movable roller (200), and the two hydraulic cylinders (3) jointly drive the movable roller (200) to rise and fall via the piston rods to adjust the size of the roller gap.

2. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 1, characterized in that: The hydraulic mechanism (400) further comprises an oil supply circuit and an oil return circuit, wherein the oil supply circuit comprises an oil supply main circuit and two first branch circuits, the two first branch circuits being connected in parallel to the oil supply main circuit, a power unit being provided at the end of the oil supply main circuit, the two first branch circuits being connected to the two hydraulic cylinders (3) respectively, a stop valve (4), a first pressure sensor (5) and a displacement sensor (6) being provided in sequence on the first branch circuit, and the oil return circuit comprises an oil return main circuit and two second branch circuits, the two second branch circuits being connected in parallel to the oil return main circuit, and a second pressure sensor (7) and a first one-way valve (8) being provided in sequence on the second branch circuit.

3. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: The power unit comprises a motor (1) and a pump (2) which are sequentially arranged on the oil supply main line.

4. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: A second one-way valve (9) and a first filter (10) are sequentially arranged on the oil supply main line.

5. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: A first accumulator (11) is also provided on the first branch line, and the first accumulator (11) is located in front of the stop valve (4).

6. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: A cooler (12) and a second filter (13) are sequentially arranged on the oil return line.

7. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: A servo valve (14) is connected to the first branch line and the second branch line connected to the same hydraulic cylinder (3). The servo valve (14) is located between the stop valve (4) and the first pressure sensor (5) of the first branch line, and the servo valve (14) is located between the second pressure sensor (7) and the first one-way valve (8) of the second branch line.

8. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 7, characterized in that: The first branch line and the second branch line connected to the same hydraulic cylinder (3) are also connected to a first overflow valve (15).

9. A hydraulic system for constant seam pressing of carbon fiber prepregs according to claim 2, characterized in that: A communication line is connected between the oil supply main line and the oil return main line, and a third pressure sensor (16), a pressure gauge (17), a second accumulator (18) and a second overflow valve (19) are sequentially arranged on the communication line.

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