Hydraulic turntable system and injection molding machine

Abstract

The invention discloses a hydraulic turntable system and an injection molding machine. According to the system, the first end of a direction valve is connected with the first connecting end of a rotary disc driving module, the second end of the direction valve is connected with the second connecting end of the rotary disc driving module, the third end of the direction valve is connected with an oil supply module, the fourth end of the direction valve is connected with an oil return pipeline, and a proportional valve is arranged on the oil return pipeline; the turntable position acquisition module is used for detecting the position information of the turntable in real time and transmitting the position information of the turntable to the control module, and the control module is used for controlling the oil supply module and the direction valve to open according to the received turntable rotation information so as to drive the turntable to rotate; the opening degree of the proportional valve and the oil supply amount and the oil supply pressure of the oil supply module are controlled to be reduced according to the position information of the turntable, so that the turntable is driven by the turntable driving module to stably decelerate until the turntable stops. Impact generated when the rotary table stops is reduced, then the fault rate of the hydraulic rotary table system is reduced, and the service life of the hydraulic rotary table system is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic turntables, and in particular to a hydraulic turntable system and an injection molding machine. Background Art

[0002] With the rapid development of economic construction, the market demand for injection molding machines with hydraulic turntable systems is increasing day by day.

[0003] In the existing hydraulic turntable systems, a servo motor is generally used to directly drive the turntable to rotate. During the process of the servo motor controlling the turntable to stop, due to the large inertia of the turntable, a large impact of the turntable is generated, which is likely to cause damage to the hydraulic turntable system. Summary of the Invention

[0004] The present invention provides a hydraulic turntable system and an injection molding machine to reduce the impact when the turntable stops, reduce the failure rate of the hydraulic turntable system, and extend the service life of the hydraulic turntable system.

[0005] According to one aspect of the present invention, a hydraulic turntable system is provided. The hydraulic turntable system includes:

[0006] A turntable, a turntable drive module, a direction valve, a proportional valve, an oil supply module, a turntable position acquisition module, and a control module;

[0007] A first end of the direction valve is connected to a first connection end of the turntable drive module, a second end of the direction valve is connected to a second connection end of the turntable drive module, a third end of the direction valve is connected to the oil supply module, a fourth end of the direction valve is connected to a return oil pipeline, and the proportional valve is arranged on the return oil pipeline;

[0008] The turntable position acquisition module is electrically connected to the control module. The turntable position acquisition module is used to detect the position information of the turntable in real time and transmit the position information of the turntable to the control module. The control module is electrically connected to the direction valve, the proportional valve, and the oil supply module. The control module is used to control the oil supply module and the direction valve to open and work according to the received turntable rotation information to drive the turntable to rotate, and control the reduction of the opening degree of the proportional valve, the oil supply amount, and the oil supply pressure of the oil supply module according to the position information of the turntable to drive the turntable to decelerate smoothly through the turntable drive module until the turntable stops; wherein, the turntable rotation information includes turntable rotation direction information and turntable rotation position information.

[0009] Further, the hydraulic turntable system further includes:

[0010] A first pressure sensor;

[0011] The first pressure sensor is arranged between the fourth end of the direction valve and the proportional valve; the first pressure sensor is used to obtain the return oil pressure at the outlet position of the fourth end of the direction valve in real time and transmit the return oil pressure to the control module;

[0012] The control module is used for:

[0013] Determine the first braking position and the target position according to the rotary table rotation position information;

[0014] If the rotary table reaches the first braking position, control the proportional valve to reduce the opening degree, so as to drive the rotary table into a deceleration state through the rotary table drive module;

[0015] If the oil return pressure is greater than or equal to the preset oil return pressure, control the proportional valve to maintain the current opening degree, and control the oil supply module to gradually reduce the oil supply volume and oil supply pressure according to the first oil supply threshold until the rotary table reaches the target position.

[0016] Furthermore, the control module is also used for:

[0017] After the rotary table reaches the target position, control the oil supply module to stop working.

[0018] Furthermore, the hydraulic rotary table system further includes:

[0019] An oil return solenoid valve;

[0020] The first end of the oil return solenoid valve is connected to the first end of the direction valve through the first oil return branch, the first end of the oil return solenoid valve is connected to the second end of the direction valve through the second oil return branch, the second end of the oil return solenoid valve is connected to the oil return pipeline through the third oil return branch, and the connection end of the third oil return branch and the oil return pipeline is arranged on the side of the proportional valve away from the direction valve;

[0021] The control module is used to control the direction valve to close and the oil return solenoid valve to open after the rotary table reaches the target position.

[0022] Furthermore, the rotary table drive module includes two hydraulic motors;

[0023] The two hydraulic motors are arranged oppositely on both sides of the rotary table. The first end of the direction valve is connected to the first connection end of the two hydraulic motors, and the second end of the direction valve is connected to the second connection end of the two hydraulic motors.

[0024] Furthermore, the hydraulic rotary table system further includes:

[0025] A fuel tank; the fourth end of the direction valve is connected to the inlet of the fuel tank through the oil return pipeline;

[0026] The oil supply module includes:

[0027] A high-pressure oil pump and a servo drive module; the high-pressure oil pump is arranged between the outlet of the fuel tank and the third end of the direction valve; the first end of the servo drive module is electrically connected to the high-pressure oil pump, and the second end of the servo drive module is electrically connected to the control module;

[0028] The control module is used to control the directional valve to open and work according to the rotary table rotation information, control the servo drive module to drive the high-pressure oil pump to work, and control the directional valve to open and work to drive the rotary table to rotate;

[0029] And control the reduction of the opening degree of the proportional valve and the output pressure of the servo drive module according to the position information of the rotary table, so as to drive the rotary table to decelerate smoothly through the rotary table drive module until the rotary table stops.

[0030] Furthermore, the oil supply module further includes:

[0031] A second pressure sensor;

[0032] The second pressure sensor is electrically connected to the servo drive module; the second pressure sensor is used to detect the output pressure of the pump port of the high-pressure oil pump in real time and transmit the output pressure of the pump port to the servo drive module; the servo drive module is used to control the output pressure of the pump port of the high-pressure oil pump to stabilize at the preset output pressure when the output pressure of the pump port is equal to the preset output pressure until the rotary table stops rotating.

[0033] Furthermore, the hydraulic rotary table system further includes:

[0034] An oil suction filter;

[0035] An oil suction filter is provided between the outlet of the high-pressure oil pump and the oil tank.

[0036] Furthermore, the rotary table position acquisition module includes a position encoder.

[0037] According to another aspect of the present invention, an injection molding machine is provided, which includes a machine body and the hydraulic rotary table system described in any of the above embodiments.

[0038] The hydraulic rotary table system provided by the embodiments of the present invention controls the oil supply module and the directional valve to open and work according to the received rotary table rotation information to drive the rotary table to rotate, and controls the reduction of the opening degree of the proportional valve and the oil supply volume and oil supply pressure of the oil supply module according to the position information of the rotary table, so as to gradually reduce the pressure difference between the hydraulic oil pressure at the third end position of the directional valve and the hydraulic oil pressure at the fourth end position of the directional valve, thereby realizing the smooth deceleration of the rotary table through the rotary table drive module until the rotary table stops. Compared with directly controlling the rotary table by a servo motor in the prior art, the impact when the rotary table stops is reduced, thereby reducing the failure rate of the hydraulic rotary table system and prolonging the service life of the hydraulic rotary table system.

[0039] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0041] Figure 1 is a schematic structural diagram of a hydraulic rotary table system provided according to an embodiment of the present invention;

[0042] Figure 2 is a schematic structural diagram of another hydraulic rotary table system provided according to an embodiment of the present invention. Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0045] The embodiments of the present invention provide a hydraulic rotary table system. Figure 1 is a schematic structural diagram of a hydraulic rotary table system provided according to an embodiment of the present invention. Refer to Figure 1 , the hydraulic rotary table system includes:

[0046] a rotary table 1, a rotary table drive module 2, a direction valve 3, a proportional valve 4, an oil supply module 5, a rotary table position acquisition module 6, and a control module;

[0047] The first end of the directional valve 3 is connected to the first connection end of the turntable drive module 2, the second end of the directional valve 3 is connected to the second connection end of the turntable drive module 2, the third end of the directional valve 3 is connected to the oil supply module 5, the fourth end of the directional valve 3 is connected to the oil return pipeline 31, and the proportional valve 4 is arranged on the oil return pipeline 31;

[0048] The turntable position acquisition module 6 is electrically connected to the control module. The turntable position acquisition module 6 is used to detect the position information of the turntable 1 in real time and transmit the position information of the turntable 1 to the control module. The control module is electrically connected to the directional valve 3, the proportional valve 4 and the oil supply module 5. The control module is used to control the oil supply module 5 and the directional valve 3 to open and work according to the received turntable rotation information to drive the turntable 1 to rotate, and control the reduction of the opening degree of the proportional valve 4 and the oil supply volume and oil supply pressure of the oil supply module 5 according to the position information of the turntable 1 to drive the turntable 1 to decelerate smoothly through the turntable drive module 2 until the turntable stops; wherein, the turntable rotation information includes turntable rotation direction information and turntable rotation position information.

[0049] Specifically, before the turntable 1 needs to be controlled to rotate, the staff can set the turntable rotation information in the control module according to actual needs. The turntable rotation information can include the turntable rotation direction, the turntable rotation position, the turntable rotation speed, etc. The embodiments of the present invention do not limit this. After receiving the set turntable rotation information, the control module controls the oil supply volume and oil supply pressure of the oil supply module 5 and the connection states of different ports in the directional valve 3 according to the set turntable rotation information to drive the turntable 1 to rotate. Exemplarily, if the set turntable rotation speed is large, the control module controls the oil supply module 5 to output a large oil supply volume and oil supply pressure. If the set turntable rotation speed is small, the control module controls the oil supply module 5 to output a small oil supply volume and oil supply pressure;

[0050] If it is necessary to control the turntable 1 to rotate clockwise, the first end A of the directional valve 3 can be controlled to communicate with the third end P, and the second end B of the directional valve 3 can be controlled to communicate with the fourth end T, so as to transmit the hydraulic oil output by the oil supply module 5 through the first end A and the third end P of the directional valve 3 to the turntable drive module 2 to drive the turntable 1 to rotate clockwise through the turntable drive module 2. At this time, the hydraulic oil flowing into the turntable drive module 2 flows out from the second end of the turntable drive module 2 through the second end B and the fourth end T of the directional valve 3;

[0051] If it is necessary to control the turntable 1 to rotate counterclockwise, the second end B of the directional valve 3 can be controlled to communicate with the third end P, and the first end A of the directional valve 3 can be controlled to communicate with the fourth end T, so as to transmit the hydraulic oil output by the oil supply module 5 through the second end B and the third end P of the directional valve 3 to the turntable drive module 2 to drive the turntable 1 to rotate counterclockwise through the turntable drive module 2. At this time, the hydraulic oil flowing into the turntable drive module 2 flows out from the second end of the turntable drive module 2 through the first end A and the fourth end T of the directional valve 3.

[0052] After driving the turntable 1 to rotate, the position information of the turntable 1 detected in real time is compared with the turntable rotation position in the turntable rotation information. When the position information of the turntable 1 is close to the set turntable rotation position in the turntable rotation information, the opening degree of the proportional valve 4 and the oil supply amount and oil supply pressure of the oil supply module 5 are controlled to gradually reduce the pressure difference between the hydraulic oil pressure at the third end T position of the directional valve 3 and the hydraulic oil pressure at the fourth end T position of the directional valve 3, thereby realizing the smooth deceleration of the turntable until the turntable stops. Exemplarily, when the position information of the turntable 1 is close to the set turntable rotation position in the turntable rotation information, the proportional valve 4 can be controlled to reduce the first opening threshold, or the opening degree of the proportional valve 4 can be gradually reduced.

[0053] The hydraulic turntable system provided by the embodiment of the present invention controls the oil supply module 5 and the directional valve 3 to open and work according to the received turntable rotation information to drive the turntable 1 to rotate, and controls the reduction of the opening degree of the proportional valve 4 and the oil supply amount and oil supply pressure of the oil supply module 5 according to the position information of the turntable 1 to gradually reduce the pressure difference between the hydraulic oil pressure at the third end T position of the directional valve 3 and the hydraulic oil pressure at the fourth end T position of the directional valve 3, thereby realizing the smooth deceleration of the turntable 1 driven by the turntable drive module 2 until the turntable stops. Compared with directly controlling the turntable 1 by a servo motor in the prior art, the impact when the turntable 1 stops is reduced, thereby reducing the failure rate of the hydraulic turntable system and prolonging the service life of the hydraulic turntable system.

[0054] Further, referring to Figure 1 , the hydraulic turntable system further includes:

[0055] The first pressure sensor PT2;

[0056] The first pressure sensor PT2 is arranged between the fourth end of the directional valve 3 and the proportional valve 4; the first pressure sensor PT2 is used to obtain the oil return pressure at the outlet position of the fourth end of the directional valve 3 in real time and transmit the oil return pressure to the control module;

[0057] The control module is used for:

[0058] Determine the first braking position and the target position according to the turntable rotation position information;

[0059] If the turntable 1 reaches the first braking position, control the reduction of the opening degree of the proportional valve 4 to drive the turntable 1 into a deceleration state through the turntable drive module 2;

[0060] If the oil return pressure is greater than or equal to the preset oil return pressure, control the proportional valve 4 to maintain the current opening degree, and control the oil supply module 5 to gradually reduce the oil supply amount and oil supply pressure according to the first oil supply threshold until the turntable 1 reaches the target position.

[0061] Among them, controlling the proportional valve 4 to maintain the current opening can be understood as controlling the proportional valve 4 to maintain the opening when the oil return pressure is greater than or equal to the preset oil return pressure.

[0062] Specifically, the control module can first determine the target position of the turntable 1 according to the turntable rotation position information in the turntable rotation information, and determine the first braking position according to the target position, that is, the position where the turntable 1 starts to enter the deceleration state. When the turntable 1 reaches the first braking position, control the proportional valve 4 to reduce the opening. Exemplarily, the opening of the proportional valve 1 can be gradually reduced according to the first opening threshold. At this time, the oil return pressure at the fourth end position of the directional valve 3 gradually increases, and when the oil return pressure detected by the first pressure sensor PT2 is greater than or equal to the preset oil return pressure, at the current opening of the proportional valve 1, control the oil supply module 5 to gradually reduce the oil supply volume and oil supply pressure according to the first oil supply threshold. While reducing the oil return pressure at the fourth end position of the directional valve 3, the pressure difference between the hydraulic oil pressure at the third end T position of the directional valve 3 and the hydraulic oil pressure at the fourth end T position of the directional valve 3 is reduced, so as to drive the turntable 1 to decelerate smoothly through the turntable drive module 2 until the turntable stops, and the turntable can stop at any angle. Among them, the preset oil return pressure, the first preset opening, and the first oil supply threshold can be set according to the actual situation.

[0063] Further, referring to Figure 1 , the control module is further used for:

[0064] After the turntable 1 reaches the target position, control the oil supply module 5 to stop working.

[0065] Specifically, after the turntable 1 reaches the target position, it indicates that the control process of the turntable 1 has ended. At this time, it is necessary to control the oil supply module 5 to stop working.

[0066] Further, continuing to refer to Figure 1 , the hydraulic turntable system further includes:

[0067] An oil return solenoid valve 7;

[0068] The first end of the oil return solenoid valve 7 is connected to the first end of the directional valve 3 through the first oil return branch 71, the first end of the oil return solenoid valve 7 is connected to the second end of the directional valve 3 through the second oil return branch 72, the second end of the oil return solenoid valve 7 is connected to the oil return pipeline 31 through the third oil return branch 73, and the connection end of the third oil return branch 73 and the oil return pipeline 31 is arranged on the side of the proportional valve 4 away from the directional valve 3;

[0069] The control module is used to control the directional valve 3 to close and control the oil return solenoid valve 7 to open and work after the turntable 1 reaches the target position.

[0070] Specifically, after the turntable 1 reaches the target position, the control process of the turntable 1 has ended. At this time, it is necessary to control the oil return solenoid valve 7 to open and work, so as to return the hydraulic oil entering the turntable drive module 2 through the oil return solenoid valve 7.

[0071] Furthermore, Figure 2 is a schematic structural diagram of another hydraulic turntable system provided according to an embodiment of the present invention. Refer to Figure 2 , the turntable drive module includes two hydraulic motors 21;

[0072] The two hydraulic motors 21 are oppositely arranged on both sides of the turntable 1. The first end of the direction valve 3 is connected to the first connection end B of the two hydraulic motors 21, and the second end of the direction valve 3 is connected to the second connection end A of the two hydraulic motors 21.

[0073] Exemplarily, if it is necessary to control the turntable 1 to rotate clockwise, the first end A of the direction valve 3 can be controlled to communicate with the third end P, and the second end B of the direction valve 3 can be controlled to communicate with the fourth end T, so as to pass the hydraulic oil output by the oil supply module 5 through the first end A and the third end P of the direction valve 3, and flow into the hydraulic motor 21 from the first connection end B of the hydraulic motor 21, so as to drive the turntable 1 to rotate clockwise through the two hydraulic motors 21. At this time, the hydraulic oil flowing into the hydraulic motor 21 flows out from the second connection end A of the hydraulic motor 21 through the second end B and the fourth end T of the direction valve 3;

[0074] If it is necessary to control the turntable 1 to rotate counterclockwise, the second end B of the direction valve 3 can be controlled to communicate with the third end P, and the first end A of the direction valve 3 can be controlled to communicate with the fourth end T, so as to pass the hydraulic oil output by the oil supply module 5 through the second end B and the third end P of the direction valve 3, and flow into the hydraulic motor 21 from the second connection end A of the hydraulic motor 21, so as to drive the turntable 1 to rotate counterclockwise through the two hydraulic motors 21. At this time, the hydraulic oil flowing into the hydraulic motor 21 flows out from the first connection end B of the hydraulic motor 21 through the first end A and the fourth end T of the direction valve 3.

[0075] Furthermore, continue to refer to Figure 1 , the hydraulic turntable system further includes:

[0076] An oil tank 8; the fourth end of the direction valve 3 is connected to the oil inlet of the oil tank 8 through an oil return pipeline 31;

[0077] The oil supply module 5 includes:

[0078] A high-pressure oil pump 51 and a servo drive module 52; the high-pressure oil pump 51 is arranged between the oil outlet of the oil tank 8 and the third end of the direction valve 3; the first end of the servo drive module 52 is electrically connected to the high-pressure oil pump 51, and the second end of the servo drive module 52 is electrically connected to the control module;

[0079] The control module is used to control the directional valve 3 to open and work according to the rotary table rotation information, control the servo drive module 52 to drive the high-pressure oil pump 51 to work, and control the directional valve 3 to open and work to drive the rotary table 1 to rotate;

[0080] And according to the position information of the rotary table 1, it controls to reduce the opening degree of the proportional valve 4 and the output pressure of the servo drive module 52, so as to drive the rotary table 1 to decelerate smoothly through the rotary table drive module 2 until the rotary table stops.

[0081] Specifically, after receiving the set rotary table rotation information, the control module controls the servo drive module 52 to drive the working state of the high-pressure oil pump 51 and the connection state of different ports in the directional valve 3 according to the set rotary table rotation information to drive the rotary table 1 to rotate; after driving the rotary table 1 to rotate, it compares the position information of the rotary table 1 detected in real time with the rotary table rotation position in the rotary table rotation information. When the position information of the rotary table 1 is close to the set rotary table rotation position in the rotary table rotation information, it controls to reduce the opening degree of the proportional valve 4 and the output pressure of the servo drive module 52, so as to gradually reduce the pressure difference between the hydraulic oil pressure at the third end T position of the directional valve 3 and the hydraulic oil pressure at the fourth end T position of the directional valve 3, thereby realizing the smooth deceleration of the rotary table until the rotary table stops. Among them, the servo drive module includes a servo motor.

[0082] Further, continue to refer to Figure 1 , the oil supply module 5 further includes:

[0083] The second pressure sensor PT1;

[0084] The second pressure sensor PT1 is electrically connected to the servo drive module 52; the second pressure sensor PT1 is used to detect the pump port output pressure of the high-pressure oil pump 51 in real time and transmit the pump port output pressure to the servo drive module 52; the servo drive module 52 is used to control the pump port output pressure of the high-pressure oil pump 51 to be stable at the preset output pressure when the pump port output pressure is equal to the preset output pressure until the rotary table 1 stops rotating.

[0085] Specifically, when the pump port output pressure is equal to the preset output pressure, the servo drive module 52 can enter the pressure control loop for automatic control to make the pump port output pressure of the high-pressure oil pump 51 stable at the preset output pressure until the rotary table 1 stops rotating. Among them, the preset output pressure can be set according to the actual situation, and the embodiments of the present invention do not limit this.

[0086] Further, continue to refer to Figure 1 , the hydraulic rotary table system further includes:

[0087] The oil suction filter 9;

[0088] An oil suction filter 9 is provided between the high-pressure oil pump 51 and the oil outlet of the fuel tank 8.

[0089] Specifically, an oil suction filter 9 is provided between the high-pressure oil pump 51 and the oil outlet of the fuel tank 8, which can reduce the amount of impurities entering the high-pressure oil pump 51, and thus can effectively reduce the failure rate of the high-pressure oil pump 51.

[0090] Further, the turntable position acquisition module includes a position encoder.

[0091] Specifically, the position encoder includes an absolute position encoder, an incremental position encoder, etc., and the embodiments of the present invention do not limit this.

[0092] The embodiment of the present invention provides an injection molding machine, which includes a fuselage body and a hydraulic turntable system as described in any of the above technical solutions, and thus has the beneficial effects of the above hydraulic turntable system, which will not be elaborated here.

[0093] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and this is not limited herein.

[0094] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydraulic turntable system, characterized in that: include: Turntable, turntable drive module, directional valve, proportional valve, oil supply module, turntable position acquisition module and control module; The first end of the directional valve is connected to the first connection end of the turntable drive module, the second end of the directional valve is connected to the second connection end of the turntable drive module, the third end of the directional valve is connected to the oil supply module, the fourth end of the directional valve is connected to the oil return pipeline, and the proportional valve is arranged on the oil return pipeline; The turntable position acquisition module is electrically connected to the control module, and the turntable position acquisition module is used to detect the position information of the turntable in real time and transmit the position information of the turntable to the control module. The control module is electrically connected to the directional valve, the proportional valve and the oil supply module, and the control module is used to control the oil supply module and the directional valve to open according to the received turntable rotation information to drive the turntable to rotate, and control the reduction of the opening of the proportional valve and the oil supply amount and oil supply pressure of the oil supply module according to the position information of the turntable, so as to drive the turntable to decelerate smoothly through the turntable drive module until the turntable stops; wherein, the turntable rotation information includes turntable rotation direction information and turntable rotation position information.

2. The hydraulic turntable system according to claim 1, characterized in that: Also includes: a first pressure sensor; The first pressure sensor is arranged between the fourth end of the directional valve and the proportional valve; The first pressure sensor is used to obtain the return oil pressure at the fourth end outlet position of the directional valve in real time, and transmit the return oil pressure to the control module; The control module is used for: Determine a first braking position and a target position according to the turntable rotation position information; If the turntable reaches the first brake position, the proportional valve opening is controlled to be reduced, so as to drive the turntable into a deceleration state through the turntable driving module; If the return oil pressure is greater than or equal to the preset return oil pressure, the proportional valve is controlled to maintain the current opening, and the oil supply module is controlled to gradually reduce the oil supply amount and the oil supply pressure according to the first oil supply threshold until the turntable reaches the target position.

3. The hydraulic turntable system according to claim 2, characterized in that: The control module is also used for: After the turntable reaches the target position, the oil supply module is controlled to stop working.

4. The hydraulic turntable system according to claim 1, characterized in that: Also includes: Oil return solenoid valve; The first end of the oil return solenoid valve is connected to the first end of the directional valve through a first oil return branch, the first end of the oil return solenoid valve is connected to the second end of the directional valve through a second oil return branch, the second end of the oil return solenoid valve is connected to the oil return pipeline through a third oil return branch, and the connecting end of the third oil return branch and the oil return pipeline is arranged on a side of the proportional valve away from the directional valve; The control module is used to control the directional valve to close and control the oil return solenoid valve to open after the turntable reaches the target position.

5. The hydraulic turntable system according to claim 1, characterized in that: The turntable drive module includes two hydraulic motors; The two hydraulic motors are arranged oppositely on both sides of the rotating disk, the first end of the directional valve is connected to the first connecting ends of the two hydraulic motors, and the second end of the directional valve is connected to the second connecting ends of the two hydraulic motors.

6. The hydraulic turntable system according to claim 1, characterized in that: Also includes: tank; The fourth end of the directional valve is connected to the oil inlet of the oil tank through the oil return pipeline; The oil supply module comprises: A high-pressure oil pump and a servo drive module; the high-pressure oil pump is arranged between the oil outlet of the oil tank and the third end of the directional valve; the first end of the servo drive module is electrically connected to the high-pressure oil pump, and the second end of the servo drive module is electrically connected to the control module; The control module is used to control the directional valve to open according to the rotation information of the turntable, and control the servo drive module to drive the high-pressure oil pump to work, and control the directional valve to open, so as to drive the turntable to rotate; The opening of the proportional valve and the output pressure of the servo drive module are controlled to be reduced according to the position information of the turntable, so as to drive the turntable to decelerate smoothly through the turntable drive module until the turntable stops.

7. The hydraulic turntable system according to claim 6, characterized in that: The oil supply module also includes: a second pressure sensor; The second pressure sensor is electrically connected to the servo drive module; the second pressure sensor is used to detect the pump port output pressure of the high-pressure oil pump in real time, and transmit the pump port output pressure to the servo drive module; the servo drive module is used to control the pump port output pressure of the high-pressure oil pump to stabilize to the preset output pressure when the pump port output pressure is equal to the preset output pressure until the turntable stops rotating.

8. The hydraulic turntable system according to claim 6, characterized in that: Also includes: Oil suction filter; The oil suction filter is arranged between the high-pressure oil pump and the oil outlet of the oil tank.

9. The hydraulic turntable system according to claim 1, characterized in that: The turntable position acquisition module includes a position encoder.

10. An injection molding machine, characterized in that: It comprises a fuselage body and a hydraulic turntable system as described in any one of claims 1-9.

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