High-precision grinding device

Abstract

The utility model relates to the technical field of ultra-precision automatic machining, in particular to a high-precision grinding device which comprises a machine frame, a vertical supporting frame is connected to the upper portion of the machine frame in a threaded mode, a sliding rail is fixedly arranged on the vertical supporting frame, a horizontal arm assembly is connected to the sliding rail in a sliding mode, and the top of the horizontal arm assembly is fixedly connected with one side of a sliding rail connecting piece. A vertical cantilever assembly is fixedly connected to the other side of the sliding rail connecting piece, a guide rail connecting piece is slidably arranged at the bottom of the vertical cantilever assembly, a rotary index plate is fixedly connected to one side of the guide rail connecting piece, a shaft seat is fixedly connected to the side, away from the guide rail connecting piece, of the rotary index plate, and a grinding head assembly is fixedly arranged in the shaft seat. Precise displacement of the grinding head assembly in the horizontal direction is achieved by arranging the horizontal arm assembly, precise displacement of the grinding head assembly in the vertical direction is achieved by arranging the vertical cantilever assembly, the surface changing function of a workpiece is achieved through a 28 closed-loop motor of the grinding head assembly, and therefore the grinding precision of the grinding device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-precision automatic processing, in particular to a high-precision grinding device. Background Art

[0002] Grinding is an important method of ultra-precision automatic machining. It is an abrasive precision machining method that uses grinding tools and abrasives to grind off a very thin layer of metal from the surface of the workpiece on the basis of fine machining. Today's grinding processes are mainly divided into manual grinding and mechanical grinding. The manual grinding process has a high risk factor and cannot guarantee accuracy. The processing mainly relies on experience, so it is gradually being eliminated today. The mechanical grinding process has problems such as low efficiency, high cost, and unstable accuracy. Especially in the processing of multiple faces, the grinding accuracy requirements are high and the processing efficiency is low. Therefore, it is necessary to accurately control the grinding mechanism and improve the processing efficiency. The market demand for grinding is strong and the development prospects are good. It is widely used in industries such as diamond facet processing and glass product finishing. In view of this, we propose a high-precision grinding device. Utility Model Content

[0003] The purpose of the utility model is to provide a high-precision grinding device to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A high-precision grinding device comprises a frame, a plurality of threaded holes are formed on the frame, a vertical support frame is threadedly connected to the top of the frame, a slide rail is fixedly arranged on the vertical support frame, a horizontal arm assembly is slidably connected to the slide rail, the top of the horizontal arm assembly is fixedly connected to one side of the slide rail connector, the other side of the slide rail connector is fixedly connected to a vertical cantilever assembly, a guide rail connector is slidably arranged on the bottom of the vertical cantilever assembly, a rotating indexing plate is fixedly connected to one side of the guide rail connector, a shaft seat is fixedly connected to the side of the rotating indexing plate away from the guide rail connector, and a grinding head assembly is fixedly arranged in the shaft seat.

[0006] Preferably, the horizontal arm assembly includes a horizontal arm body, a first DC gear reduction motor, and a displacement sensor. The top of the horizontal arm body is bolted to one side of the slide rail connector, a slider is fixedly arranged at the bottom of the horizontal arm body, and the slider is slidably connected to the slide rail. The first DC gear reduction motor is arranged on the left side of the horizontal arm body, and the output end of the first DC gear reduction motor is fixedly connected to the slider, and a displacement sensor is fixedly arranged on the right side of the horizontal arm body.

[0007] Preferably, the vertical cantilever assembly includes a vertical cantilever body, a second DC gear reduction motor, a displacement sensor, and a guide rail. The vertical cantilever body is bolted to the other side of the slide rail connector. A slide rail is provided on the vertical cantilever body. The slide rail is slidably connected to the guide rail connector. The output end of the second DC gear reduction motor is fixedly connected to the guide rail connector. The displacement sensor is fixedly installed on one side of the vertical cantilever body.

[0008] Preferably, the grinding head assembly includes a 28 closed-loop motor, a clamping shaft, and a clamping head. The output end of the 28 closed-loop motor is fixedly connected to one end of the clamping shaft through a coupling. The 28 closed-loop motor is fixed in the shaft seat through a motor mounting plate. The other end of the clamping shaft is equipped with a clamping head, a rotating nut is provided on the clamping head, a clamping ring is provided on the end of the clamping head away from the clamping shaft, an outer ring sleeve is provided on the outer side of one end of the clamping shaft close to the clamping head through a bearing sleeve, and the outer ring sleeve is fixedly connected to the shaft seat.

[0009] Preferably, the 28 closed-loop motors are also electrically connected to a PID controller and a PLC controller respectively.

[0010] Preferably, a plurality of thickened plates are further provided on the guide rail connector, and both ends of the thickened plates are respectively connected to the guide rail connector by bolts.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The high-precision grinding device realizes precise horizontal displacement of the grinding head assembly by setting a horizontal arm assembly, realizes precise vertical displacement of the grinding head assembly by setting a vertical cantilever assembly, and realizes the surface changing function of the workpiece through the 28 closed-loop motor of the grinding head assembly, thereby improving the grinding accuracy of the grinding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional isometric view of the overall structure of the utility model;

[0014] Figure 2 It is a left view of the overall structure of the utility model;

[0015] Figure 3 It is a full cross-sectional view of the grinding head of the utility model.

[0016] In the figure: 1. vertical support frame; 2. slide rail; 3. guide rail connector; 4. shaft seat; 5. slide rail connector; 6. displacement sensor; 7. first DC gear reduction motor; 8. thickening plate; 9. second DC gear reduction motor; 10. frame; 11. workpiece; 12. 28 closed-loop motor; 13. coupling; 14. clamping shaft; 15. clamping head; 16. motor mounting plate; 17. outer ring sleeve; 18. bearing; 19. rotating nut; 20. clamping ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0021] See also Figure 1-Figure 3 As shown, a technical solution provided by the utility model:

[0022] A high-precision grinding device comprises a frame 10, wherein the frame 10 is provided with a plurality of threaded holes, in the present embodiment, preferably eight threaded holes, wherein four threaded holes are used to fix the entire device in a working area, and the remaining four threaded holes are used to threadably connect a vertical support frame 1 above the frame 10, wherein a slide rail 2 is fixedly arranged on the vertical support frame 1, a horizontal arm assembly is slidably connected to the slide rail 2, the top of the horizontal arm assembly is fixedly connected to one side of a slide rail connector 5, the other side of the slide rail connector 5 is fixedly connected to a vertical cantilever assembly, a guide rail connector 3 is slidably arranged at the bottom of the vertical cantilever assembly, one side of the guide rail connector 3 is fixedly connected to a rotating dividing plate, the side of the rotating dividing plate away from the guide rail connector 3 is fixedly connected to an axle seat 4, a grinding head assembly is fixedly arranged in the axle seat 4, the horizontal arm assembly is used to adjust the horizontal position of the grinding head assembly, and the vertical cantilever assembly is used to adjust the vertical position of the grinding head assembly.

[0023] As an implementation mode of this embodiment, the horizontal arm assembly includes a horizontal arm body, a first DC gear reduction motor 7, and a displacement sensor 6. The top of the horizontal arm body is bolted to one side of the slide rail connector 5, and a slider is fixedly arranged at the bottom of the horizontal arm body. The slider is slidably connected to the slide rail 2. The first DC gear reduction motor 7 is arranged on the left side of the horizontal arm body, and the output end of the first DC gear reduction motor 7 is fixedly connected to the slider. The slider is driven by the first DC gear reduction motor 7 to move horizontally on the slide rail 2, thereby driving the vertical cantilever assembly to move horizontally through the slide rail connector 5 to adjust the horizontal position of the grinding head assembly. A displacement sensor 6 is fixedly arranged on the right side of the horizontal arm body. During the horizontal movement of the grinding head assembly, the displacement sensor 6 can be used to feedback control the accuracy.

[0024] As an implementation mode of this embodiment, the vertical cantilever assembly includes a vertical cantilever body, a second DC gear reduction motor 9, a displacement sensor 6, and a guide rail. The vertical cantilever body is bolted to the other side of the slide rail connector 5. A slide rail is provided on the vertical cantilever body, and the slide rail is slidably connected to the guide rail connector 3. The output end of the second DC gear reduction motor 9 is fixedly connected to the guide rail connector 3. The displacement sensor 6 is fixedly installed on one side of the vertical cantilever body. The guide rail connector 3 is driven up and down on the guide rail by the second DC gear reduction motor 9, thereby driving the grinding head assembly to move up and down to adjust the vertical position of the grinding head assembly. During the up and down movement of the grinding head assembly, the displacement sensor 6 can also be used to perform feedback control accuracy to achieve slow feed movement during processing and return movement after processing.

[0025] In this embodiment, the grinding head assembly includes a 28 closed-loop motor 12, a clamping shaft 14, and a clamping head 15. The output end of the 28 closed-loop motor 12 is fixedly connected to one end of the clamping shaft 14 through a coupling 13. The 28 closed-loop motor 12 is fixed in the shaft seat 4 through a motor mounting plate 16. The other end of the clamping shaft 14 is installed with a clamping head 15, and a rotating nut 19 is provided on the clamping head 15. A clamping ring 20 is provided at the end of the clamping head 15 away from the clamping shaft 14. The workpiece 11 is installed inside the clamping head 15 through the clamping ring 20, and the workpiece 11 is clamped by the rotating nut 19 to prevent the workpiece from falling off. The outer side of the end of the clamping shaft 14 close to the clamping head 15 is provided with an outer ring sleeve 17 through a bearing 18. The bearing 18 is preferably a deep groove ball bearing. The outer ring sleeve 17 is fixedly connected to the shaft seat 4. The 28 closed-loop motor 12 is used to drive the workpiece 11 to realize the surface changing function.

[0026] In this embodiment, the 28 closed-loop motors 12 are also electrically connected to a PID controller and a PLC controller, respectively. The 28 closed-loop motors use I0.0 to measure the motor speed. The motor speed is between 0 and the maximum motor speed. Multiplying n by 27648 gives the corresponding value between the analog value 0-27648. Then, a PID is called to define the measured value as 0-27648. The set value can be between 0-100. The PID output value is sent to the frequency converter via MUDBUS to realize processing speed control. The 28 closed-loop motors 12 use the communication PLC to directly write the rotation parameters to the corresponding address to control the rotation angle of the processing surface, thereby realizing the surface changing function.

[0027] In addition, the first DC gear reduction motor 7 and the second DC gear reduction motor 9 use current control to adjust the output torque to control the speed of the motor and achieve a slow feed motion of 4N. This control method can maintain a stable output torque, but due to the influence of the parasitic inductance and resistance of the motor itself, a sensor feedback loop is required to control the motor current.

[0028] In this embodiment, a plurality of thickened plates 8 are further provided on the guide rail connector 3, and both ends of the thickened plates 8 are respectively bolted to the guide rail connector 3 to ensure that the grinding head assembly is stably mounted on the guide rail connector 3, thereby transmitting the feed motion to the grinding head assembly.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision grinding device, characterized in that: The invention comprises a frame (10), wherein a plurality of threaded holes are formed on the frame (10), a vertical support frame (1) is threadedly connected to the top of the frame (10), a slide rail (2) is fixedly arranged on the vertical support frame (1), a horizontal arm assembly is slidably connected to the slide rail (2), the top of the horizontal arm assembly is fixedly connected to one side of a slide rail connector (5), the other side of the slide rail connector (5) is fixedly connected to a vertical cantilever assembly, a guide rail connector (3) is slidably arranged at the bottom of the vertical cantilever assembly, one side of the guide rail connector (3) is fixedly connected to a rotating indexing plate, the side of the rotating indexing plate away from the guide rail connector (3) is fixedly connected to an axle seat (4), and a grinding head assembly is fixedly arranged in the axle seat (4).

2. The high-precision grinding device according to claim 1, characterized in that: The horizontal arm assembly comprises a horizontal arm body, a first DC gear reduction motor (7), and a displacement sensor (6); the top of the horizontal arm body is bolted to one side of a slide rail connector (5); a slider is fixedly arranged at the bottom of the horizontal arm body; the slider is slidably connected to the slide rail (2); the first DC gear reduction motor (7) is arranged on the left side of the horizontal arm body; the output end of the first DC gear reduction motor (7) is fixedly connected to the slider; and the displacement sensor (6) is fixedly arranged on the right side of the horizontal arm body.

3. The high-precision grinding device according to claim 1, characterized in that: The vertical cantilever assembly comprises a vertical cantilever body, a second DC gear reduction motor (9), a displacement sensor (6), and a guide rail. The vertical cantilever body is bolted to the other side of a slide rail connector (5). A slide rail is provided on the vertical cantilever body. The slide rail is slidably connected to the guide rail connector (3). The output end of the second DC gear reduction motor (9) is fixedly connected to the guide rail connector (3). The displacement sensor (6) is fixedly mounted on one side of the vertical cantilever body.

4. The high-precision grinding device according to claim 1, characterized in that: The grinding head assembly comprises a 28 closed-loop motor (12), a clamping shaft (14), and a clamping head (15). The output end of the 28 closed-loop motor (12) is fixedly connected to one end of the clamping shaft (14) through a coupling (13). The 28 closed-loop motor (12) is fixed in the shaft seat (4) through a motor mounting plate (16). The other end of the clamping shaft (14) is installed with a clamping head (15). A rotating nut (19) is provided on the clamping head (15). A clamping ring (20) is provided at one end of the clamping head (15) away from the clamping shaft (14). An outer ring sleeve (17) is provided on the outer side of one end of the clamping shaft (14) close to the clamping head (15) through a bearing (18). The outer ring sleeve (17) is fixedly connected to the shaft seat (4).

5. The high-precision grinding device according to claim 4, characterized in that: The closed-loop motor (12) 28 is also electrically connected to a PID controller and a PLC controller respectively.

6. The high-precision grinding device according to claim 1, characterized in that: A plurality of thickened plates (8) are also provided on the guide rail connecting member (3), and two ends of the thickened plates (8) are respectively connected to the guide rail connecting member (3) by bolts.

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