CN101254509B - A hydraulic servo battery pole piece rolling mill - Google Patents

Abstract

The invention discloses a hydraulic servo battery pole piece rolling mill, which comprises a base, a frame installed on the base, a lower roll and an upper roll installed in the frame for rolling, and a computer is connected to the bearing seat where the roll is installed. Controlled pressing servo hydraulic cylinder; the outer side of the lower bearing housing of the lower rolling roll and the upper bearing housing of the upper rolling roll is also equipped with a computer-controlled bending roll that adjusts the bearing gap between the lower rolling roll and the upper rolling roll hydraulic cylinder. The invention realizes three control modes of constant pressure rolling, constant gap rolling and constant thickness rolling for the battery pole piece, and can control the position, pressure and thickness of the battery pole piece online in real time, and can be controlled in three ways The control mode can be switched freely, so as to meet the higher requirements of the accuracy of the battery pole piece.

Description

A hydraulic servo battery pole piece rolling mill

technical field

The invention relates to a rolling mill for rolling battery pole pieces, in particular to a rolling mill for controlling the accuracy of the battery pole piece through hydraulic means.

Background technique

The pole piece of the battery is one of the main components of the battery. The pole pieces of the same thickness are required to have a uniform thickness deviation. When connecting pole pieces of different thicknesses, a uniform transition is also required to maintain a uniform thickness of the pole pieces of the same thickness. . Therefore, the rolling required for battery thickness is relatively strict, and the precision required by the rolling mill is also relatively high.

Chinese patents disclose a lot of rolling mills for battery pole pieces. For example, the following Chinese patents disclose technologies related to battery pole piece rolling mills:

Patent No. Patent Name

200620127276.7 Lithium-ion battery pole piece rolling mill

200520128639.4 Gap-reducing bending roll mechanism for battery pole piece rolling mill

200520128638.X battery pole piece rolling mill frame

200520128636.0 Clearance mechanism for battery pole piece rolling mill

200520122854.3 Gap adjustment device for battery pole piece rolling mill

200520001827.0 Battery pole piece rolling device

200420047542.6 Four-column battery pole piece rolling mill

200420028251.2 Constant gap device for battery pole piece rolling mill

200610066044.X Battery Pole Coating Continuous Rolling System

The above patents mainly involve five technologies: 1. The structure of the rolling mill stand; 2. The pressurization method of the rolling mill; 3. The adjustment method of the gap between the rolls of the rolling mill; 4. The control of the bearing clearance of the rolling mill; 5. The roll deflection and deformation control of the rolling mill, in which the gap adjustment method between the rolls of the rolling mill is the key technology to realize the accurate thickness of the battery pole piece. Except for the patent No. 200620127276.7, which uses electric pressing to adjust the plate thickness, and adjusts the gap between the rolls through the eccentric sleeve device, other patents rely on wedge iron and screw to adjust the roll gap adjustment method. The main body is a threaded screw, and the lead screw is provided with a main wedge and an auxiliary wedge matched with the main wedge. The main wedge and the auxiliary wedge are placed between the upper and lower bearing seats of the upper and lower rolls. When finely adjusting the gap between the upper and lower rolls of the battery pole piece rolling mill, the auxiliary wedge is moved, and the gap between the upper and lower rolls is realized by using the change of the wedge surface in contact between the main wedge and the auxiliary wedge Adjustment.

Since the thickness of the raw material before battery pole piece rolling may be uneven, the gap between the upper and lower rolls may vary randomly during the rolling process, thereby affecting the precision of pole piece rolling. The above-mentioned adjustment methods all belong to the off-line roll gap adjustment method, that is, when adjusting the gap between the upper and lower rolls, it is necessary to stop the machine and then adjust, and then perform the work of rolling the pole piece after the adjustment is completed. This not only affects work efficiency, but also can not realize on-line adjustment of the gap between the upper and lower rolls.

Contents of the invention

The technical problem to be solved by the present invention is to provide a rolling mill that realizes online adjustment of the gap and deflection deformation between the upper and lower rolls.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A hydraulic servo battery pole piece rolling mill, including a base, a frame installed on the base, and a computer-controlled hydraulic system matched with the rolling mill. The frame is divided into two left and right sides, which are connected together by upper and lower connecting beams and fixed on the base superior. The upper and lower bearing seats are installed in the inner cavity of the frame, and the main bearings of the roll are respectively mounted on the upper and lower bearing seats, and the large shaft diameter of the upper roll and the large shaft diameter of the lower roll are respectively mounted in the main bearing Shaft diameter, on the frame above each upper bearing seat, a servo hydraulic cylinder for pressing down that is connected with the upper bearing seat and provides power for the upper bearing seat to move up and down. Gap-adjusting bearings are set on the small shaft diameter of the upper rolling roll and the small shaft diameter of the lower rolling roll. Servo-hydraulic cylinders for upper and lower pressing rollers provide force for moving up and down.

The base of the depressing servo hydraulic cylinder is installed on the frame, and the free end of the hydraulic ejector rod is installed on the bearing seat of the rolling upper roller.

The base of the servo hydraulic cylinder is installed on the lower gap adjustment bearing seat, and the free end of the hydraulic ejector rod is installed on the upper gap adjustment bearing seat. One or more than two roll bending hydraulic cylinders are respectively arranged between the upper and lower gap adjusting bearing seats on each side.

The above-mentioned hydraulic system includes a constant pressure oil source, a hydraulic cylinder, and a servo control valve connected between the constant pressure oil source and the hydraulic cylinder; There is a pressure sensor for sensing the pressure of the hydraulic cylinder, and the pressure sensor is connected with the computer.

Owing to adopting above-mentioned technical scheme, the technological progress that the present invention obtains is:

Due to the computer-controlled hydraulic adjustment method, the corresponding computer program can be preset according to the required rolling pressure or rolling gap, and the gap between the upper and lower rolls can be adjusted online by computer control, so as to ensure the battery life. Sheet rolling accuracy.

The servo hydraulic cylinder installed on the upper and lower gap adjustment bearing seats can provide the bending pressure for correcting the roll, so that the straightness of the roll can be kept within a certain range of accuracy. This fully hydraulic computer-controlled adjustment method has a simple structure and high sensitivity, and can meet very strict thickness accuracy requirements.

Compared with other types of systems, the hydraulic servo system has the following advantages: the power-to-weight ratio and moment-to-inertia ratio of hydraulic components are large, and the transmitted torque and power are large. Therefore, a servo system with small size, light weight, strong acceleration capability and fast action can be formed to control high power and large load. The response speed of the hydraulic actuator is fast, the transmission of the hydraulic actuator is stable, the anti-interference ability is strong, the speed regulation range is wide, and the control performance is good especially in the low-speed operation state.

Fig. 1 is the structural representation of mechanical part of the present invention;

Fig. 2 is a right side view of Fig. 1 .

Description of drawings

Among them: 1. Base, 2. Frame, 3. Lower clearance bearing seat, 4. Servo hydraulic cylinder, 5. Upward clearance bearing seat, 6. Press down servo hydraulic cylinder, 7. Upper connecting beam, 8. Upper bearing seat , 9, rolling the upper roll, 10, rolling the lower roll, 11, the lower bearing seat, 12. the lower connecting beam, 13, the gap adjustment bearing, 14, the main bearing.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

As shown in Fig. 1, 2, the present invention comprises base 1, the frame 2 that is installed on the base 1 that is positioned at the both sides of base 1, between frame 2, be installed with roller 10 that rolls down and roller 9 that rolls up, The rolling upper roller 9 is installed in the upper bearing housing 8 at both ends through the main bearings 14 at both ends, and the rolling lower roller 10 is installed in the lower bearing housing 11 at both ends through the main bearings 14 at both ends. Bearing block 11 is installed in the inner chamber of frame 2, and frame 2 is divided into left and right two, and connects together by upper connecting beam 7 and lower connecting beam 12. The upper part of the frame 2 is equipped with a press-down servo hydraulic cylinder 6, which is connected with the upper bearing seat 8 and provides moving pressure for the upper bearing seat 8, so that the upper roller 9 can be rolled to obtain an appropriate pressure during the working process. ;

Gap-adjusting bearings 13 are set on the small shaft diameter of the upper rolling roll and the small shaft diameter of the lower rolling roll. 5, 3 is equipped with the servo hydraulic cylinder 4 that provides up-and-down movement power for rolling the upper roll 9 and the rolling lower roll 10. The base of the servo hydraulic cylinder 4 is installed on the lower gap-adjusting bearing seat, and the free end of the hydraulic ejector rod is installed on the upper gap-adjusting bearing seat. Four servo hydraulic cylinders 4 are arranged on two pairs of upper and lower gap-adjusting bearing seats 5 and 3 on both sides of the frame 2, and the four servo hydraulic cylinders 4 are connected to the hydraulic system respectively, and the hydraulic system is controlled by a computer.

The above-mentioned hydraulic cylinders (comprising two depression servo hydraulic cylinders 6 and four servo hydraulic cylinders 4) are respectively connected with the hydraulic system, and the hydraulic system is controlled by a computer. In addition to the hydraulic cylinder, the hydraulic system also includes a constant pressure oil source connected to the computer, a servo control valve is connected between the constant pressure oil source and the hydraulic cylinder, and a sensor is installed in the hydraulic pipeline between each hydraulic cylinder and each servo control valve. A pressure sensor for hydraulic cylinder pressure, the pressure sensor is connected with the computer.

When the battery pole piece is rolled, the corresponding computer program can be preset according to the required rolling pressure or rolling gap. The hydraulic pressure sensor on the hydraulic line of the servo hydraulic cylinder 6 can randomly sense the change in the hydraulic pressure of the hydraulic cylinder caused by the change in the gap between the upper roller 9 and the lower roller 10, and transmit these sensing signals to the computer, and then the computer will By controlling and pressing down the servo hydraulic cylinder 6, by adjusting the pressure on the upper rolling roll 9, the gap between the upper rolling roll 9 and the lower rolling roll 10 can be randomly adjusted online when rolling battery pole pieces, thereby ensuring The rolling accuracy of the battery pole piece is guaranteed.

Simultaneously, the hydraulic pressure sensor on the servo hydraulic cylinder 4 hydraulic pipeline will be able to randomly sense the variation of the hydraulic pressure of the hydraulic cylinder caused by the change in the bearing gap between the upper roller 9 and the lower roller 10, and transmit these sensing signals to the computer, and then The computer controls four servo hydraulic cylinders 4. By adjusting the pressure on the upper and lower gap adjustment bearing seats 5 and 3, the force of moving up and down the upper roller 9 and the lower roller 10 can be generated, and the online random adjustment of the roller can be achieved. The bearing clearance of the main bearing 14 of the upper roller 9 and the lower roller 10 can be adjusted, and the deflection deformation produced by the upper roller 9 and the lower roller 10 can be adjusted, thereby further ensuring the rolling accuracy of the battery pole piece.

Claims (2)

1. A hydraulic servo battery pole piece rolling mill, comprising a base (1), a frame (2) mounted on the base (1), two pairs of bearing housings (8, 11) fixed on the housing, bearing housings (8 , 11) are mounted with roll main bearings (14) respectively, and in the roll main bearings (14) are respectively equipped with the large shaft diameter of the rolling top roll (9) and the large shaft diameter of the rolling bottom roll (10), and the rolling mill The supporting computer-controlled hydraulic system also includes a pressing servo hydraulic cylinder (6) that is installed on the frame (2) and connected to the upper bearing seat (8) to provide up and down movement force for rolling the upper roller (9), It is characterized in that the gap-adjusting bearing (13) is set on the small shaft diameter of the rolling upper roll and the small shaft diameter of the rolling lower roll, and the gap-adjusting bearing (13) is installed on the upper and lower gap-adjusting bearing seats (5, 3 ), a servo hydraulic cylinder (4) is installed on the upper and lower gap-adjusting bearing seats (5, 3) to provide up and down movement force for rolling the upper roll (9) and the rolling lower roll (10); The base of the lower servo hydraulic cylinder (6) is installed on the frame (2), and the free end of the hydraulic mandrel is installed on the upper bearing seat (8) of the rolling upper roller (9); the servo hydraulic cylinder (4 ) base is installed on the lower clearance bearing seat, and the free end of the hydraulic ejector rod is installed on the upper clearance bearing seat. 2. The hydraulic servo battery pole piece rolling mill according to claim 1, characterized in that: the hydraulic system includes a constant pressure oil source, a hydraulic cylinder, and a servo control valve connected between the constant pressure oil source and the hydraulic cylinder; A pressure sensor for sensing the pressure of the hydraulic cylinder is arranged in the hydraulic pipeline between the cylinder and the servo control valve, and the pressure sensor is connected with the computer.

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