Grinding wheel automatic correction device based on servo motor control flow valve hydraulic control system

Abstract

The invention discloses an automatic grinding wheel correction device based on a servo motor control flow valve hydraulic control system, and belongs to the field of driving devices for grinding wheel correction. Comprising a mobile station; the correction assembly is used for correcting the grinding wheel so that the grinding wheel can have an initial state and a correction state; wherein the hydraulic control system for controlling the flow valve based on the servo motor is used for enabling the movable table to move; the hydraulic control system for controlling the flow valve based on the servo motor comprises a driving oil cylinder; an oil tank; a power member; and a reversing member. The device has the beneficial effects that the working table is driven to move in a hydraulic driving mode, and a hydraulic driving power source is far away from the working table, so that the working table is separated from the hydraulic driving power source, and vibration generated by mechanical driving of the working table is greatly reduced; and the grinding wheel correcting precision and the workpiece machining precision are better guaranteed.

Description

Technical Field

[0001] This application relates to the field of drive devices for grinding wheel dressing, and more specifically, to an automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system. Background Technology

[0002] Grinding wheels are common grinding tools widely used in households, factories, and machinery manufacturing industries. However, after prolonged use, grinding wheels can deform or wear due to uneven force, excessive frequency of use, or over-grinding, leading to decreased performance or even malfunction.

[0003] To restore the balance and efficiency of the grinding wheel, it needs to be corrected. Correction can eliminate the imbalance of the grinding wheel, ensuring its stability and safety during use;

[0004] Existing grinding wheel dressing devices typically have a movable worktable for mounting the workpiece to be ground. The worktable is usually moved by a lead screw and nut. However, this method of driving the lead screw and nut generates vibration when the motor drives the four-cylinder to rotate, causing the worktable to vibrate. This results in poor grinding accuracy of the grinding wheel on the workpiece, leading to inaccurate correction parameters when dressing the grinding wheel, resulting in even worse grinding accuracy on the workpiece. Summary of the Invention

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] To address the technical problems mentioned in the background section, some embodiments of this application provide an automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system. The device comprises: a movable stage for mounting the workpiece to be ground; a dressing component for dressing the grinding wheel to allow it to have an initial state and a dressed state; wherein the servo motor-controlled flow valve hydraulic control system is used to move the movable stage; the servo motor-controlled flow valve hydraulic control system includes: a drive cylinder forming a linearly movable transmission end, a first input end for driving the transmission end, and a second input end for depressurizing the transmission end; an oil tank forming a chamber for containing hydraulic oil; a power component connecting the oil tank and the drive cylinder via a servo motor-controlled flow valve; and a reversing component for constructing a first drive circuit connecting the oil tank to the first input end via the power component and the servo motor-controlled flow valve; and also for constructing a second drive circuit connecting the oil tank to the second input end via the power component and the servo motor-controlled flow valve.

[0007] Furthermore, the hydraulic control system based on the servo motor-controlled flow valve also includes a pressure relief component, which is located between the power component and the servo motor-controlled flow valve; the power component is connected to the servo motor-controlled flow valve through the pressure relief component.

[0008] Furthermore, the servo motor control flow valve is used to form at least a low-flow communication mode that causes the transmission end of the drive cylinder to move at low speed and a high-flow communication mode that causes the transmission end of the drive cylinder to move at high speed between the power component and the commutator.

[0009] Furthermore, the servo motor-controlled flow valve includes a servo motor and a flow valve; the flow valve has multiple connection modes; the servo motor is used to switch the connection modes of the flow valve.

[0010] Furthermore, the high-speed movement speed of the transmission end of the drive cylinder is up to 25 m / min; the low-speed movement speed of the transmission end of the drive cylinder is up to 1 m / min.

[0011] Furthermore, the pressure relief valve has a first port, a second port, and a third port; the power component causes the oil in the tank to pass through the first port and the second port in sequence to reach the reversing component; the third port forms a pressure relief channel with the first port and the second port; the third port is connected to the oil tank.

[0012] Furthermore, the reversing member has a first connection port, a second connection port, a third connection port, and a fourth connection port; the first connection port is connected to the second port of the pressure relief valve via a servo motor-controlled flow valve; the second connection port is connected to the first input end of the drive cylinder; the third connection port is connected to the second input end of the drive cylinder; the fourth connection port is connected to the oil tank; the reversing member also has a control unit, which is used to connect the first connection port to the second connection port and the third connection port to the fourth connection port, or connect the first connection port to the third connection port and the second connection port to the fourth connection port.

[0013] Furthermore, the servo motor-controlled flow valve hydraulic control system includes multiple connecting pipes; the multiple connecting pipes are used to allow hydraulic oil to flow back to the oil tank in sequence, at least through the oil tank, the power component, the first port of the pressure relief valve, and the third port of the pressure relief valve.

[0014] Furthermore, the correction device further includes: a drive assembly for moving the grinding wheel along the height direction to at least a grinding height position, a safety zone, a correction height position, and an adjustment height position; a sensor assembly for presetting the grinding height position, the safety zone, the correction height position, the adjustment height position, the working zone, and the non-working zone; the correction assembly is used to correct the grinding wheel located at the grinding height position; when the grinding wheel is in the initial state, the drive assembly moves the grinding wheel to the grinding height position; when the grinding wheel is in the correction state, the drive assembly moves the grinding wheel to the adjustment height position.

[0015] Furthermore, the grinding wheel also has a preset movement trajectory; the oil-throttling hydraulic drive system is used to move the moving table to at least the working area and the non-working area, so that the grinding wheel located at the grinding height position can grind a grinding surface on the workpiece; the grinding wheel located at the grinding height position moves along the preset movement trajectory, so that the grinding wheel can form multiple interconnected grinding surfaces on the workpiece; the multiple interconnected grinding surfaces cover the upper end surface of the workpiece.

[0016] The beneficial effects of this application are as follows: by using a hydraulic drive to move the worktable, the hydraulic drive power source is far away from the worktable, which makes the worktable relatively separate from the hydraulic drive power source, thereby greatly reducing the vibration generated by mechanical drive of the worktable and better ensuring the accuracy of grinding wheel dressing and workpiece machining. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0018] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0019] In the attached diagram:

[0020] Figure 1 This is an overall schematic diagram based on an embodiment of this application;

[0021] Figure 2 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 A structure observed from another perspective;

[0022] Figure 3 yes Figure 2 Enlarged view of part A;

[0023] Figure 4 yes Figure 2 Enlarged view of part A;

[0024] Figure 5 This is a structural schematic diagram as part of an embodiment, mainly showing a flowchart of a hydraulic drive system based on oil outlet throttling.

[0025] Figure label:

[0026] 1. Moving table; 2. Drive assembly; 3. Correction assembly; 4. Grinding wheel; 5. Oil tank; 6. Oil pump; 7. Control components; 8. Worktable guide rail; 9. Pressure relief valve. Detailed Implementation

[0027] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0028] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0030] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0031] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Reference Figure 1-5 ,

[0033] An automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system includes: a moving table and a dressing component.

[0034] The moving stage is used to mount the workpiece to be ground. The dressing assembly is used to dress the grinding wheel so that it has an initial state and a dressed state. The initial state of the grinding wheel is its shape before dressing, and the dressed state is its shape after dressing.

[0035] The servo motor-controlled flow valve hydraulic control system is used to move the mobile platform. When the platform moves within the working area, the oil outlet throttling hydraulic drive system puts the platform in a high-speed movement mode; when the platform moves outside the working area, the oil outlet throttling hydraulic drive system puts the platform in a low-speed movement mode.

[0036] The servo motor-controlled flow valve hydraulic control system includes: a drive cylinder, an oil tank, a power component, and a reversing component.

[0037] The drive cylinder comprises a linearly movable transmission end, a first input end for driving the transmission end, and a second input end for depressurizing the transmission end. The oil tank forms a chamber for containing hydraulic oil. A power unit controls a flow valve via a servo motor to connect the oil tank to the drive cylinder. A reversing mechanism is used to construct a first drive circuit connecting the oil tank to the first input end via the power unit and the servo motor-controlled flow valve; it also constructs a second drive circuit connecting the oil tank to the second input end via the power unit and the servo motor-controlled flow valve. The transmission end of the drive cylinder is connected to a moving platform; linear movement of the transmission end of the drive cylinder drives the moving platform.

[0038] Specifically, the hydraulic control system based on the servo motor-controlled flow valve further includes: a pressure relief component, which is located between the power component and the servo motor-controlled flow valve; the power component is connected to the servo motor-controlled flow valve through the pressure relief component.

[0039] Specifically, the servo motor control flow valve is used to form at least a low-flow communication mode that causes the transmission end of the drive cylinder to move at low speed and a high-flow communication mode that causes the transmission end of the drive cylinder to move at high speed between the power component and the commutator.

[0040] Specifically, the servo motor controlled flow valve includes a servo motor and a flow valve; the flow valve has multiple connection modes; the servo motor is used to switch the connection modes of the flow valve.

[0041] Specifically, the high-speed movement speed of the transmission end of the drive cylinder is up to 25 m / min; the low-speed movement speed of the transmission end of the drive cylinder is up to 1 m / min.

[0042] Specifically, the pressure relief valve has a first port, a second port, and a third port; the power component causes the oil in the tank to pass through the first port and the second port in sequence to reach the reversing component; the third port forms a pressure relief channel with the first port and the second port; the third port is connected to the oil tank.

[0043] Specifically, the reversing member has a first connection port, a second connection port, a third connection port, and a fourth connection port; the first connection port is connected to the second port of the pressure relief valve via a servo motor-controlled flow valve; the second connection port is connected to the first input end of the drive cylinder; the third connection port is connected to the second input end of the drive cylinder; the fourth connection port is connected to the oil tank; the reversing member also has a control unit, which is used to connect the first connection port to the second connection port and the third connection port to the fourth connection port, or connect the first connection port to the third connection port and the second connection port to the fourth connection port.

[0044] Specifically, the servo motor-controlled flow valve hydraulic control system includes multiple connecting pipes; the multiple connecting pipes are used to allow hydraulic oil to flow back to the oil tank in sequence, at least through the oil tank, the power component, the first port of the pressure relief valve, and the third port of the pressure relief valve.

[0045] Specifically, the correction device further includes a drive assembly and a sensor assembly.

[0046] A drive assembly is used to move the grinding wheel along the height direction to at least the grinding height position, the safety zone, the correction height position, and the adjustment height position. A sensor assembly is used to preset the grinding height position, the safety zone, the correction height position, the adjustment height position, the working zone, and the non-working zone. The correction assembly is used to correct the grinding wheel located at the grinding height position. When the grinding wheel is in the initial state, the drive assembly moves the grinding wheel to the grinding height position. When the grinding wheel is in the correction state, the drive assembly moves the grinding wheel to the adjustment height position.

[0047] Specifically, the grinding wheel also has a preset movement trajectory; the oil-throttling hydraulic drive system, used to move the moving table to at least the working area and non-working area, allows the grinding wheel located at the grinding height position to grind a grinding surface on the workpiece; the grinding wheel located at the grinding height position moves along the preset movement trajectory, allowing the grinding wheel to form multiple interconnected grinding surfaces on the workpiece; the multiple interconnected grinding surfaces cover the upper end surface of the workpiece. In this application, the preset trajectory is a movement direction of the grinding wheel that is simultaneously perpendicular to the height direction and perpendicular to the movement direction of the worktable. The grinding wheel moves along the preset trajectory, which is a trajectory that causes the grinding wheel to move a certain distance and then stop moving and repeat the operation. The certain distance that the grinding wheel moves is less than the thickness of the grinding wheel.

[0048] The servo motor-controlled flow valve hydraulic control system is used to move the moving table to at least the working area and the non-working area. The working area is the area on the working table where the workpiece can contact the grinding wheel, and the non-working area is the area on the working table where the workpiece cannot contact the grinding wheel.

[0049] The grinding height position is the position where the workpiece can contact the grinding wheel and be ground. In this embodiment, if the grinding wheel grinds the workpiece to a thickness of 0.05mm, multiple feeds can be performed according to the actual situation. The first feed grinds a thickness of 0.02mm. At this time, the grinding position is the position where the lowest point of the grinding wheel is 0.02mm lower than the upper end surface of the workpiece.

[0050] The safe zone is the position where the grinding wheel is far away from the workpiece, and at a height where the grinding wheel cannot contact the workpiece regardless of how it moves.

[0051] Among them, the correction height position is the height position of the grinding wheel when the grinding wheel is being corrected.

[0052] The adjustment position refers to the position after the grinding wheel has been corrected and moved downwards a certain distance. Grinding wheel correction reduces the diameter of the grinding wheel. If the diameter is reduced by 0.01mm, the adjustment position is the position after the grinding wheel has been moved downwards by 0.01mm. The reason for this is that if the tool path follows the previous internal feed program after the grinding wheel diameter is reduced, it will result in an error of 0.01mm. Therefore, by moving the grinding wheel downwards by 0.01mm and then continuing with the previous feed program, this error is eliminated.

[0053] Specifically, the drive assembly is also used to move the grinding wheel to the feed position and to move the grinding wheel between the grinding height position and the feed position. The sensor assembly is also used to preset a preset grinding depth for the workpiece; the feed position is the position preset by the sensor assembly, which is the position where the grinding wheel needs to be corrected after grinding the workpiece to the preset thickness. When the grinding wheel moves to the feed position, the grinding wheel needs to be corrected. In this embodiment, the preset grinding depth is preferably 0.03 mm; after the grinding wheel is corrected, the diameter of the grinding wheel is reduced by 0.01 mm.

[0054] Specifically, the correction component is connected to the moving stage so that the correction component moves synchronously with the worktable; the worktable can also be moved to the correction operation position; when the worktable is in the correction operation position, the grinding wheel is in the correction height position, and the correction component can correct the grinding wheel.

[0055] In this embodiment, the correction component is a diamond pen, which is fixed on the worktable.

[0056] In this embodiment, the drive component is a combination of a lead screw and nut pair and a linear guide. The grinding wheel can move along the height direction and along a preset trajectory through two sets of lead screw and nut pairs and two sets of linear guides. The lead screw and nut pair and the linear guide are conventional technologies and will not be described in detail.

[0057] The device also includes a table guide rail, which is used to guide the movement of the moving table. The table guide rail adopts conventional technology and is a linear guide rail, which will not be described in detail.

[0058] In other embodiments, the control method for the automatic grinding wheel dressing device based on the servo motor-controlled flow valve hydraulic control system is as follows:

[0059] The sensor assembly generates grinding signals that are sent to the drive assembly and the hydraulic control system based on the servo motor-controlled flow valve.

[0060] The drive assembly moves the grinding wheel to the grinding height position, and the servo motor-controlled flow valve hydraulic control system moves the moving table in the working area, causing the workpiece to move relative to the grinding wheel; the movement of the moving table in the working area allows the grinding wheel at the grinding height position to grind a grinding surface on the workpiece.

[0061] The grinding wheel, located at the grinding height position, moves along the preset movement trajectory, so that the grinding wheel forms multiple interconnected grinding surfaces on the workpiece that cover the upper end face of the workpiece, thus completing the grinding in a single feed.

[0062] The drive assembly also moves the grinding wheel to the feed position and moves the grinding wheel between the grinding height position and the feed position, and repeats the above steps to complete multiple single feed grinding operations; when the grinding wheel moves to the feed position, the grinding wheel completes the preset grinding depth and finishes grinding.

[0063] The sensor assembly acquires the position of the grinding wheel and generates a safety signal when the grinding wheel moves to the feed position, which is then sent to the drive assembly and the hydraulic control system based on the servo motor-controlled flow valve.

[0064] The drive assembly moves the grinding wheel to a safe area, and the servo motor-controlled flow valve hydraulic control system moves the worktable to the non-working area in a low-speed mode.

[0065] The sensor assembly acquires the position of the grinding wheel and generates a correction signal to be sent to the drive assembly when the grinding wheel moves to a safe area;

[0066] The drive assembly moves the grinding wheel to the correction height position, and the hydraulic control system based on the servo motor-controlled flow valve moves the worktable to the correction operation position, at which point the grinding wheel contacts the correction assembly.

[0067] The drive component moves the grinding wheel along a preset trajectory, enabling the grinding wheel to fully contact the correction component;

[0068] The sensor assembly generates an adjustment signal that is sent to the drive assembly;

[0069] The drive component moves the grinding wheel to the adjusted height position, at which point the entire correction process is completed.

[0070] Repeat the above steps until the workpiece is ground.

[0071] Specifically, the preset grinding depth is 0.03 mm; the diameter of the grinding wheel is reduced by 0.01 mm after the grinding wheel is corrected; and the adjusted height position is 0.01 mm lower than the corrected height position in the height direction.

[0072] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A grinding wheel automatic dressing device based on a servo motor control flow valve hydraulic control system, characterized in that, include: A movable stage, used to mount the workpiece to be ground; A dressing component is used to dress the grinding wheel so that the grinding wheel can have an initial state and a dressed state; The servo motor-controlled flow valve hydraulic control system is used to move the mobile platform. The servo motor-controlled flow valve hydraulic control system includes: The hydraulic cylinder is configured to form a transmission end that can move linearly, a first input end that can drive the transmission end, and a second input end that can depressurize the transmission end. The oil tank forms a chamber for containing hydraulic oil; The power component uses a servo motor to control the flow valve, which connects the oil tank to the drive cylinder. The reversing component is used to construct a first drive circuit that connects the oil tank to the first input terminal via a flow control valve controlled by a power component and a servo motor; it is also used to construct a second drive circuit that connects the oil tank to the second input terminal via a flow control valve controlled by a power component and a servo motor.

2. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 1, characterized in that: The servo motor-controlled flow valve hydraulic control system also includes: A pressure relief component is located between the power component and the servo motor-controlled flow valve. The power component is connected to the servo motor control flow valve through the pressure relief component.

3. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 2, characterized in that: The servo motor control flow valve is used to form at least a low-flow communication mode that causes the drive end of the drive cylinder to move at low speed and a high-flow communication mode that causes the drive end of the drive cylinder to move at high speed between the power component and the commutator.

4. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 3, characterized in that: The servo motor-controlled flow valve includes a servo motor and a flow valve; the flow valve has multiple connection modes; the servo motor is used to switch the connection modes of the flow valve.

5. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 4, characterized in that: The high-speed movement speed of the transmission end of the drive cylinder is up to 25 m / min; The transmission end of the drive cylinder moves at a low speed of 1 m / min.

6. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 5, characterized in that: The pressure relief valve has a first port, a second port, and a third port. The power component causes the oil in the tank to pass sequentially through the first port and the second port to reach the reversing component; A pressure relief channel is established between the third port and the first and second ports; The third port is connected to the oil tank.

7. The automatic grinding wheel dressing device based on a servo motor-controlled flow valve hydraulic control system according to claim 6, characterized in that: The commutator has a first connection port, a second connection port, a third connection port and a fourth connection port formed on it; The first connecting port is communicated with the second port of the pressure relief valve through a servo motor controlled flow valve; the second connecting port is communicated with the first input end of the driving oil cylinder; the third connecting port is communicated with the second input end of the driving oil cylinder; and the fourth connecting port is communicated with the oil tank. The reversing piece further has a control part for communicating the first connecting port with the second connecting port, the third connecting port with the fourth connecting port, or the first connecting port with the third connecting port, and the second connecting port with the fourth connecting port. 8.The grinding wheel automatic correction device based on the servo motor controlled flow valve hydraulic control system according to claim 7, characterized in that: The servo motor controlled flow valve hydraulic control system comprises a plurality of communication pipes. The plurality of communication pipes are used for allowing the hydraulic oil to flow back to the oil tank in sequence through the oil tank, the power piece, the first port of the pressure relief valve, and the third port of the pressure relief valve. 9.The grinding wheel automatic correction device based on the servo motor controlled flow valve hydraulic control system according to claim 8, characterized in that: The correction device further comprises: a driving assembly for moving the grinding wheel in the height direction to at least the grinding height position, the safety area, the correction height position, and the adjustment height position; a sensor assembly for presetting the grinding height position, the safety area, the correction height position, the adjustment height position, the working area, and the non-working area; the correction assembly is used for correcting the grinding wheel at the grinding height position; when the grinding wheel is in the initial state, the driving assembly moves the grinding wheel to the grinding height position; and when the grinding wheel is in the correction state, the driving assembly moves the grinding wheel to the adjustment height position. 10.The grinding wheel automatic correction device based on the servo motor controlled flow valve hydraulic control system according to claim 9, characterized in that: The grinding wheel further has a preset movement track. The oil outlet throttling hydraulic driving system is used for moving the movement platform to at least the working area and the non-working area, so that the grinding wheel at the grinding height position grinds a grinding surface on the workpiece; The grinding wheel at the grinding height position moves along the preset movement track, so that the grinding wheel forms a plurality of mutually connected grinding surfaces on the workpiece; The plurality of mutually connected grinding surfaces cover the upper end surface of the workpiece.

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