Radial constant force polishing mechanism for the inner cavity of a cylinder

Abstract

The application provides a barrel inner cavity radial constant force polishing mechanism, which comprises a machine base, a feeding mechanism, an inner supporting mechanism, a first linear guide rail, a wedge-shaped plate, a grinding mechanism, a pressure sensor, a cylinder thrust mechanism and a second linear guide rail; the feeding mechanism and the inner supporting mechanism are installed on the machine base, the pressure sensor is installed on the grinding mechanism, and the first linear guide rail and the second linear guide rail are installed between the grinding mechanism and the machine base; the wedge-shaped plate is installed on the pressure sensor, a rolling friction pair is formed between the wedge-shaped plate and the feeding mechanism, and the cylinder thrust mechanism is arranged between the pressure sensor and the machine base. The floating assembly such as the wedge-shaped plate is driven by the cylinder thrust mechanism to float linearly along the radial direction of the barrel, so that the floating polishing of radial translation can be realized, and the existing product gap in the market is filled.

Description

Technical Field

[0001] This invention relates to the field of grinding devices, and more specifically, to a radial constant force grinding mechanism for the inner cavity of a cylinder. Background Technology

[0002] In the field of radial grinding of cylinder cavities, especially for small cylinder cavities, existing products on the market cannot meet the requirements of radial translational floating grinding, and currently, manual grinding is the main solution. Currently, similar floating grinding products on the market all rotate around a single axis, but grinding cylinder welds requires a smooth transition. Using existing products can lead to problems such as incomplete grinding, over-grinding, and uncontrolled grinding precision. This necessitates a floating grinding method that uses a grinding wheel for radial linear translation with precise positioning. To address this need, a radial constant-force grinding mechanism for cylinder cavities has been developed, solving the problems of difficulties in manual grinding and the inability of existing products on the market to meet the requirements.

[0003] Current grinding equipment, as shown in patent document CN114346874A, discloses a grinding and polishing device for the inner cavity of a motor. This device includes a base and a support structure. The support structure is vertically mounted on the top surface of the base, and the base includes a support seat. The support structure includes a support column, a support plate, and a grinding structure. The support plate is horizontally positioned directly above the support seat. Support columns are vertically welded to both sides of the bottom surface of the support plate, with the bottom ends of the support columns welded to the top surface of the support seat. The grinding structure is vertically mounted on the bottom surface of the support plate. Such existing grinding equipment cannot meet the requirements for high-precision, smooth grinding. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a radial constant force grinding mechanism for the inner cavity of a cylinder.

[0005] A radial constant force grinding mechanism for the inner cavity of a cylinder according to the present invention includes: a base, a feeding mechanism, an inner support mechanism, a first linear guide rail, a wedge plate, a grinding mechanism, a pressure sensor, a cylinder thrust mechanism, and a second linear guide rail.

[0006] The feeding mechanism and the internal support mechanism are mounted on the machine base, the pressure sensor is mounted on the grinding mechanism, and the first linear guide rail and the second linear guide rail are installed between the grinding mechanism and the machine base;

[0007] The wedge plate is mounted on the pressure sensor, and a rolling friction pair is formed between the wedge plate and the feed mechanism. The cylinder thrust mechanism is arranged between the pressure sensor and the base.

[0008] Preferably, the feeding mechanism includes: a linear module, a first slider, a support base, a first pin, and a bearing;

[0009] The linear module is mounted on the base, the support is slidably connected to the linear module via the first slider, the bearing is rotatably mounted on the support via the first pin, and the wedge plate and the bearing form a rolling friction pair.

[0010] Preferably, the internal support mechanism includes: a cylinder support plate, an internal support cylinder, a roller support seat, a second pin, and a roller;

[0011] The cylinder support plate is mounted on the machine base, the inner support cylinder is mounted on the cylinder support plate, the inner support cylinder is connected to and pushes the roller support seat, and the roller is rotatably mounted on the roller support seat through the second pin.

[0012] Preferably, the grinding mechanism includes: an L-shaped mounting plate, a spindle, a clamp, a grinding wheel spindle, a first nut, and a grinding wheel;

[0013] The clamp and the pressure sensor are respectively installed on both sides of the L-shaped mounting plate along the sliding direction of the first linear guide rail. The main shaft is fixed on the L-shaped mounting plate by the clamp. The grinding wheel shaft is installed on the main shaft. The grinding wheel shaft and the grinding wheel are installed by the first nut.

[0014] Preferably, the first linear guide rail includes: a guide rail and a second slider;

[0015] The guide rail is mounted on the base, the second slider is slidably connected to the guide rail, and the L-shaped mounting plate is mounted on the second slider.

[0016] Preferably, the cylinder thrust mechanism includes: a cylinder push plate, a first screw, and a push cylinder;

[0017] The pressure sensor is mounted on the side of the wedge plate with the cylinder push plate installed. The two ends of the cylinder push plate are connected to the push cylinder by the first screw. The push cylinder is mounted on the machine base.

[0018] Preferably, the first linear guide and the second linear guide are located on both sides of the cylinder push plate along the axial direction of the grinding mechanism.

[0019] Preferably, the second linear guide rail includes: a guide rail support, a second screw, a second nut, a light shaft, a bushing, and a collar;

[0020] The guide rail support is mounted on the machine base. The optical axis is installed between the guide rail support and the machine base by the second screw and the second nut. The bushing is fitted on the optical axis and slides along the optical axis. The bushing is provided with a collar on the outside of the bushing, and the collar is connected to the L-shaped mounting plate.

[0021] Preferably, the compressed air of the push cylinder, the pressure sensor, and the proportional control valve form a feedback mechanism.

[0022] Preferably, the diameter of the grinding wheel is larger than the diameter of the clamp.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This application uses a cylinder thrust mechanism to drive floating components such as wedge plates to float linearly along the radial direction of the cylinder, which can realize radial translational floating grinding, filling the gap in existing products on the market;

[0025] 2. This application uses a pressure sensor to provide real-time feedback on the grinding force and a proportional control valve to precisely control the grinding force, resulting in better grinding performance;

[0026] 3. The servo motor of the feed mechanism controls the bearing to reach the limit position by adjusting the position of the slider. The rolling friction pair formed by the bearing and the wedge plate determines the final grinding position, ensuring precise limiting and grinding accuracy.

[0027] 4. This application uses multiple linear guide rails for support, resulting in more even force distribution and better stability;

[0028] 5. The internal support mechanism of this application has multiple support points, which allows the entire mechanism to extend into the interior of the cylinder, resulting in better structural rigidity. Attached Figure Description

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 A sectional view of the grinding mechanism from the main view direction;

[0031] Figure 2 A schematic diagram of the three-dimensional structure of the grinding mechanism (I);

[0032] Figure 3 Schematic diagram of the three-dimensional structure of the grinding mechanism (II);

[0033] As shown in the figure:

[0034]

[0035] Detailed Implementation

[0036] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment includes: a base 1, a feed mechanism 2, an inner support mechanism 3, a first linear guide rail 4, a wedge plate 5, a grinding mechanism 6, a pressure sensor 7, a cylinder thrust mechanism 8, and a second linear guide rail 9; the feed mechanism 2 and the inner support mechanism 3 are mounted on the base 1, the pressure sensor 7 is mounted on the grinding mechanism 6, the first linear guide rail 4 and the second linear guide rail 9 are installed between the grinding mechanism 6 and the base 1, the wedge plate 5 is mounted on the pressure sensor 7, a rolling friction pair is formed between the wedge plate 5 and the feed mechanism 2, and the cylinder thrust mechanism 8 is provided between the pressure sensor 7 and the base 1.

[0039] The feeding mechanism 2 includes: a linear module 21, a first slider 22, a support base 23, a first pin 24, and a bearing 25; the linear module 21 is mounted on the base 1, the support base 23 is slidably connected to the linear module 21 through the first slider 22, the bearing 25 is rotatably mounted on the support base 23 through the first pin 24, and the wedge plate 5 and the bearing 25 form a rolling friction pair.

[0040] Combination Figure 3 As shown, the inner support mechanism 3 includes: a cylinder support plate 31, an inner support cylinder 32, a roller support seat 33, a second pin 34, and a roller 35; the cylinder support plate 31 is mounted on the machine base 1, multiple sets of inner support cylinders 32 are mounted on the cylinder support plate 31, the inner support cylinders 32 are connected to and push the roller support seat 33, and the roller 35 is rotatably mounted on the roller support seat 33 through the second pin 34.

[0041] The first linear guide rail 4 includes: a guide rail 41 and a second slider 42; the guide rail 41 is mounted on the base 1, the second slider 42 is slidably connected to the guide rail 41, and an L-shaped mounting plate 61 is mounted on the second slider 42.

[0042] The grinding mechanism 6 includes: an L-shaped mounting plate 61, a spindle 62, a clamp 63, a grinding wheel spindle 64, a first nut 65, and a grinding wheel 66. The clamp 63 and pressure sensor 7 are respectively mounted on both sides of the L-shaped mounting plate 61 along the sliding direction of the first linear guide rail 4. The spindle 62 is fixed to the L-shaped mounting plate 61 by the clamp 63. The grinding wheel spindle 64 is mounted on the spindle 62, and the grinding wheel 66 is mounted on the grinding wheel spindle 64 via the first nut 65. The diameter of the grinding wheel 66 is larger than the diameter of the clamp 63.

[0043] like Figure 2 As shown, the cylinder thrust mechanism 8 includes: a cylinder push plate 81, a first screw 82, and a pressing cylinder 83; the cylinder push plate 81 is mounted on the side of the pressure sensor 7 facing the wedge plate 5, and the two ends of the cylinder push plate 81 are connected to the pressing cylinder 83 through the first screw 82. The pressing cylinder 83 is mounted on the machine base 1. The first linear guide rail 4 and the second linear guide rail 9 are respectively located on both sides of the cylinder push plate 81 along the axial direction of the grinding mechanism 6. The compressed air of the pressing cylinder 83, the pressure sensor 7, and the proportional regulating valve form a feedback mechanism.

[0044] The second linear guide 9 includes: a guide support 91, a second screw 92, a second nut 93, an optical axis 94, a bushing 95, and a collar 96; the guide support 91 is mounted on the base 1, and the optical axis 94 is installed between the guide support 91 and the base 1 through the second screw 92 and the second nut 93; the bushing 95 is fitted on the optical axis 94 and slides along the optical axis 94; a collar 96 is provided on the outside of the bushing 95, and the collar 96 is connected to the L-shaped mounting plate 61.

[0045] Example 2

[0046] Example 2 is a preferred example of Example 1.

[0047] The main principles employed in this embodiment include: real-time acquisition of grinding force and feedback control of the thrust of the push cylinder 83 to achieve floating grinding; the use of a servo system to position the wedge plate 5 for limiting to achieve high-precision grinding; multiple linear guide rails to support and enhance system rigidity; and an internal support mechanism 3 to assist in improving structural stability.

[0048] like Figures 1 to 3As shown, this embodiment includes: a base 1. Two pairs of linear guides (first linear guide 4 and second linear guide 9) are mounted on the base 1. The first linear guide 4 is symmetrically mounted on the lower sides of the base 1, and the second linear guide 9 is symmetrically mounted on the upper sides of the base 1. An L-shaped mounting plate 61 is mounted on the first linear guide 4. A clamp 63 and a pressure sensor 7 are respectively mounted on both sides of the L-shaped mounting plate 61. The clamp 63 is used to mount a spindle 62, and a grinding wheel 66 is mounted on the spindle 62. The grinding wheel 66 has a larger outer dimension than the clamp 63. A wedge plate 5 and a cylinder push plate 81 are mounted on the pressure sensor 7. The first linear guide 4 and the second linear guide 9 are respectively mounted on the upper and lower sides of the cylinder push plate 81, with the cylinder push plate 81 in the middle. The wedge plate 5 forms a rolling friction pair with the bearing 25, which can limit the movement of the grinding wheel 66. The bearing 25 is mounted on a first slider 22, and the position of the wedge plate 5 is controlled by adjusting the first slider 22 up and down. Pushing cylinders 83 are installed on both sides of the cylinder pusher plate 81. The pushing cylinders 83 apply grinding force and form a floating device. The thrust of the pushing cylinders 83 is controlled by compressed air, and the compressed air, together with the proportional regulating valve and the pressure sensor 7, forms a feedback mechanism to make the grinding force precise and controllable. An internal support mechanism 3 is installed under the machine base 1. The roller 35 is controlled by three sets of internal support cylinders 32, which can enhance the overall rigidity of the mechanism and achieve precise grinding.

[0049] More specifically, this embodiment includes: a base 1, a feed mechanism 2, an internal support mechanism 3, a first linear guide rail 4, a wedge plate 5, a grinding mechanism 6, a pressure sensor 7, a cylinder thrust mechanism 8, and a second linear guide rail 9.

[0050] The feeding mechanism 2, the inner support mechanism 3, the first linear guide rail 4, the cylinder thrust mechanism 8, and the second linear guide rail 9 are all mounted on the machine base 1. The main actions that can be achieved include: the up-and-down movement of the bearing 25, the back-and-forth movement of the wedge plate 5, the back-and-forth movement of the roller 35, and the rotational movement of the grinding wheel 66.

[0051] The grinding power is provided by the spindle 62. The grinding wheel 66 is fixed to the first nut 65 via the grinding wheel shaft 64. The end of the spindle 62 is clamped to the grinding wheel shaft 64 using a standard ER collet (a cylindrical clamp used to hold drilling, tapping, milling, or machining center spindles, also called an ER collet). The spindle 62 is fixedly mounted on the L-shaped mounting plate 61 via a semi-circular clamp 63. The grinding wheel 66 is larger than the clamp 63, allowing the outer diameter of the grinding wheel 66 to contact the inner cavity of the cylinder before the outer diameter of the clamp 63. The pressure sensor 7, cylinder push plate 81, and wedge plate 5 are sequentially mounted on the L-shaped mounting plate 61, forming an integrated front and rear floating assembly.

[0052] The main actuating component of the floating grinding system is the cylinder thrust mechanism 8. By extending and retracting the push cylinder 83, the floating component achieves linear floating along the radial direction of the cylinder. The pressure sensor 7 and the cylinder thrust mechanism 8 form a feedback execution system. The pressure sensor outputs the radial grinding force value in real time. The control system converts the grinding force value into a compressed air pressure value, and then the proportional regulating valve controls the real-time input air pressure of the push cylinder 83 to adjust the thrust within a specified range and ensure a good grinding effect.

[0053] The grinding accuracy is achieved by the feed mechanism 2. The bearing 25 is fixedly installed on the support base 23 by the first pin 24. The servo motor of the linear module 21 controls the bearing 25 to reach the limit position by adjusting the position of the slider 22. The rolling friction pair formed by the bearing 25 and the wedge plate 5 determines the final grinding position.

[0054] The inner support mechanism 3 provides auxiliary support for the overall system. Since this invention targets the machining of deep cavity inner walls, the entire mechanism must extend into the cylinder. Insufficient rigidity can cause grinding wobbling, a problem effectively solved by the inner support mechanism 3. The roller 35 is made of polyurethane coated material, ensuring it does not scratch the workpiece surface and is heat-resistant. Pressure is applied to the inner wall of the cylinder via the inner support cylinder 32, causing the roller 35 to rotate with the cylinder.

[0055] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A radial constant force grinding mechanism for the inner cavity of a cylinder, characterized in that, include: The machine base (1), feed mechanism (2), internal support mechanism (3), first linear guide (4), wedge plate (5), grinding mechanism (6), pressure sensor (7), cylinder thrust mechanism (8) and second linear guide (9); The feeding mechanism (2) and the inner support mechanism (3) are mounted on the machine base (1), the pressure sensor (7) is mounted on the grinding mechanism (6), and the first linear guide (4) and the second linear guide (9) are installed between the grinding mechanism (6) and the machine base (1). The wedge plate (5) is mounted on the pressure sensor (7), and a rolling friction pair is formed between the wedge plate (5) and the feed mechanism (2). The cylinder thrust mechanism (8) is provided between the pressure sensor (7) and the base (1). The feeding mechanism (2) includes: a linear module (21), a first slider (22), a support base (23), a first pin (24), and a bearing (25); The linear module (21) is mounted on the base (1), the support seat (23) is slidably connected to the linear module (21) through the first slider (22), the bearing (25) is rotatably mounted on the support seat (23) through the first pin (24), and the wedge plate (5) and the bearing (25) form a rolling friction pair; The inner support mechanism (3) includes: a cylinder support plate (31), an inner support cylinder (32), a roller support seat (33), a second pin (34), and a roller (35); The cylinder support plate (31) is mounted on the machine base (1), and multiple sets of inner support cylinders (32) are mounted on the cylinder support plate (31). The inner support cylinders (32) are connected to and push the roller support seat (33). The roller (35) is rotatably mounted on the roller support seat (33) through the second pin (34). The roller (35) is made of polyurethane coated material. The grinding mechanism (6) includes: an L-shaped mounting plate (61), a spindle (62), a clamp (63), a grinding wheel spindle (64), a first nut (65), and a grinding wheel (66); The L-shaped mounting plate (61) has the clamp (63) and the pressure sensor (7) installed on both sides of the sliding direction of the first linear guide rail (4), the main shaft (62) is fixed on the L-shaped mounting plate (61) by the clamp (63), the grinding wheel shaft (64) is installed on the main shaft (62), and the grinding wheel shaft (64) and the grinding wheel (66) are installed by the first nut (65). The cylinder thrust mechanism (8) includes: a cylinder push plate (81), a first screw (82), and a push cylinder (83); The pressure sensor (7) is mounted on the side of the wedge plate (5) with the cylinder push plate (81) installed. The two ends of the cylinder push plate (81) are connected to the push cylinder (83) by the first screw (82). The push cylinder (83) is mounted on the base (1).

2. The radial constant force grinding mechanism for the inner cavity of the cylinder according to claim 1, characterized in that, The first linear guide (4) includes: a guide rail (41) and a second slider (42); The guide rail (41) is mounted on the base (1), the second slider (42) is slidably connected to the guide rail (41), and the L-shaped mounting plate (61) is mounted on the second slider (42).

3. The radial constant force grinding mechanism for the inner cavity of the cylinder according to claim 1, characterized in that: The first linear guide (4) and the second linear guide (9) are located on both sides of the cylinder push plate (81) along the axial direction of the grinding mechanism (6).

4. The radial constant force grinding mechanism for the inner cavity of the cylinder according to claim 1, characterized in that, The second linear guide (9) includes: a guide support (91), a second screw (92), a second nut (93), an optical axis (94), a bushing (95), and a collar (96); The guide rail support (91) is mounted on the base (1). The optical axis (94) is installed between the guide rail support (91) and the base (1) by the second screw (92) and the second nut (93). The bushing (95) is fitted on the optical axis (94) and slides along the optical axis (94). The bushing (95) is provided with the collar (96) on the outside of the bushing (95). The collar (96) is connected to the L-shaped mounting plate (61).

5. The radial constant force grinding mechanism for the inner cavity of the cylinder according to claim 1, characterized in that: The compressed air of the push cylinder (83), the pressure sensor (7), and the proportional control valve form a feedback mechanism.

6. The radial constant force grinding mechanism for the inner cavity of the cylinder according to claim 1, characterized in that: The diameter of the grinding wheel (66) is larger than the diameter of the clamp (63).

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