Grinding machine and method for sealing piston ring

Abstract

The invention relates to the technical field of aero-engine part manufacturing equipment, in particular to a grinding machine and method for a sealing piston ring. The grinding machine comprises a machine cabinet, the machine cabinet comprises a workbench in an inner cavity of the machine cabinet, and a closed upper cavity is formed in the upper space of the workbench; a vertical first rotating shaft is mounted on the cabinet body, and the lower end of the first rotating shaft extends into the upper cavity; an abrasive cloth disc is arranged at the lower end of the first rotating shaft, and abrasive cloth is adhered to the lower surface of the abrasive cloth disc; a second rotating shaft is vertically mounted on the workbench, the upper end of the second rotating shaft extends into the upper cavity, and a containing disc is mounted at the upper end of the second rotating shaft through a quick mounting mechanism; a driving mechanism is arranged in the cabinet body and used for driving the first rotating shaft and the second rotating shaft to rotate around the axes of the first rotating shaft and the second rotating shaft respectively, and the rotating directions of the first rotating shaft and the second rotating shaft are opposite.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engine parts manufacturing equipment, and in particular to a grinding machine and method for sealing expansion rings. Background Art

[0002] Sealing rings play a key role in sealing and reducing friction in aircraft engines, ensuring stable internal engine pressure and reducing frictional losses between components, thereby improving overall engine performance and reliability. Chrome plating of sealing rings can enhance their wear resistance, improve friction conditions, and, thanks to the special structure of the chrome layer's surface, retain lubricant, further extending the sealing ring's service life. Before chrome plating, both sides of the sealing ring need to be polished to remove oxide films and rust, exposing the substrate to improve plating adhesion and achieve better chrome layer quality.

[0003] At present, the existing grinding machines are Figure 1 As shown, a holding tray is installed on the workbench of the cabinet through a rotating shaft, and a driving motor is installed inside the cabinet to drive the rotating shaft to rotate and then drive the holding tray to rotate. When the end face of the sealing ring is polished, the sealing ring is clamped in the holding tray and rotates with the holding tray. The operator holds a grinding stick to polish the end face of the sealing ring.

[0004] The existing grinding machine has the following problems:

[0005] (1) The sealing ring is easy to fly out and injure people or hit the guard plate and break and become scrap during the high-speed rotation and grinding process;

[0006] (2) The workbench of the grinder is an open structure. The dust generated during the grinding process is easy to spread everywhere and can be inhaled by the operator, causing physical damage.

[0007] (3) When grinding sealing rings of different diameters, it is necessary to replace the corresponding size of the holding plate. Since the holding plate in the existing grinding machine is fixed to the top of the rotating shaft by screws, the screws need to be removed every time the holding plate is replaced, which is cumbersome. Summary of the Invention

[0008] The main purpose of the present invention is to provide a grinding machine and method for sealing expansion rings, aiming to solve the above technical problems.

[0009] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a grinder for sealing expansion rings, comprising a cabinet, the cabinet including a workbench in its inner cavity, and the upper space of the workbench forming a closed upper cavity; a vertical first rotating shaft is installed on the cabinet, and the lower end of the first rotating shaft extends into the upper cavity; and an emery cloth disc is provided at the lower end of the first rotating shaft, and emery cloth is bonded to the lower surface of the emery cloth disc; a second rotating shaft is vertically installed on the workbench, the upper end of the second rotating shaft extends into the upper cavity, and a containing plate is installed at the upper end of the second rotating shaft through a quick-loading mechanism; a driving mechanism is provided inside the cabinet, for driving the first rotating shaft and the second rotating shaft to rotate around their own axes, and the rotation directions of the first rotating shaft and the second rotating shaft are opposite.

[0010] Preferably, the driving mechanism includes a motor, a bridge shaft, a first belt and a second belt; the motor is installed in the inner cavity at the lower part of the cabinet, and a first pulley and a driving gear are installed on the output shaft of the motor in sequence from bottom to top; a second pulley is provided at the lower end of the second rotating shaft; the second belt is jointly sleeved on the first pulley and the second pulley; a driven gear is provided at the lower end of the bridge shaft for meshing with the driving gear; a third pulley is installed on the top of the bridge shaft, and a fourth pulley is installed in the middle of the first rotating shaft; the first belt is jointly sleeved on the third pulley and the fourth pulley.

[0011] Preferably, the cabinet includes a belt cover and a shaft cover arranged in the upper cavity; the belt cover is horizontally installed on the lower surface of the top plate of the cabinet; the shaft cover is vertically installed on the workbench, and the left end of the belt cover is connected to the upper end of the shaft cover; the bridge shaft is installed inside the shaft cover; the third pulley, the first belt, and the fourth pulley are arranged inside the belt cover.

[0012] Preferably, arc-shaped holes corresponding to upper and lower positions are respectively opened on the top plate of the cabinet and the bottom plate of the belt cover; the center of the arc-shaped hole coincides with the axis of the bridge shaft; and the first rotating shaft is slidably inserted into the arc-shaped hole.

[0013] Preferably, the upper part of the first rotating shaft is set as a spline shaft, and the center of the fourth pulley is provided with an internal spline hole and is slidably sleeved on the spline shaft of the first rotating shaft; a spring seat plate and an axial limit plate are rotatably installed on the upper part of the first rotating shaft, and a handle head is rotatably installed on the top end of the first rotating shaft; a first spring is sleeved on the first rotating shaft; the upper end of the first spring abuts against the lower surface of the top plate of the cabinet, and the lower end abuts against the spring seat plate; the first spring is in a compressed energy storage state and is used to form an axial downward force on the first rotating shaft and push the first rotating shaft to move downward; in the initial state, there is a gap between the axial limit plate and the upper surface of the top plate of the cabinet; when polished into place, the axial limit plate abuts against the upper surface of the top plate of the cabinet.

[0014] Preferably, the lower part of the bridge shaft is set as a spline shaft; a toggle wheel is integrally formed on the upper part of the driven gear, and an inner spline hole is provided at the center of the combination formed by the driven gear and the toggle wheel, and is slidably sleeved on the spline shaft at the lower part of the bridge shaft; an annular groove is provided on the outer peripheral surface of the toggle wheel; a toggle rod is provided inside the cabinet, and the toggle rod extends into the annular groove of the toggle wheel, and is used to toggle the combination formed by the driven gear and the toggle wheel up and down, so that the driven gear is separated from or engaged with the driving gear.

[0015] Preferably, a dust suction port is provided on the rear side wall of the cabinet, and the dust suction port is communicated with the upper cavity; the dust suction port is used to connect to a dust suction hose of a vacuum cleaner.

[0016] Preferably, an inclined plate is provided on the upper part of the cabinet, and an observation window is opened on the inclined plate, and a transparent tempered glass plate is installed on the observation window; two operation holes are opened on the front panel of the cabinet, and the operation holes are connected to the upper cavity; openable cabinet doors are provided on the left and right side walls of the upper cavity.

[0017] Preferably, the quick-install mechanism includes a bracket, an expansion sleeve, a second spring, an expansion bolt and a support plate; the bracket is integrally formed at the top end of the second rotating shaft; the second spring and the support plate are both sleeved on the second rotating shaft; the two expansion sleeves are arranged in two countersunk holes of the bracket; each expansion sleeve includes a plurality of annularly evenly distributed expansion petals, and an expansion inclined surface is provided on the inner wall surface of the expansion petal; the top of the expansion bolt is provided with an inverted cone-shaped expansion head; two expansion sleeve holes are provided on the containing plate; An annular sink is provided on the surface; the bracket is inserted in the annular sink of the holding plate, and the expansion petal of the expansion sleeve is inserted in the expansion sleeve hole of the holding plate; the expansion bolt passes through the expansion sleeve and is screwed onto the supporting plate; the upper end of the second spring rests on the bracket, and the lower end rests on the supporting plate; and the second spring is in a compressed energy storage state and pushes the supporting plate downward, so that the supporting plate pulls the expansion bolt downward, and the expansion head of the expansion bolt pushes the expansion petal of the expansion sleeve to expand outward and rest tightly on the expansion sleeve hole.

[0018] On the other hand, the present invention provides a method for grinding a sealing expansion ring, using the above-mentioned grinding machine, comprising the following steps:

[0019] S1. Select a suitable holding plate according to the outer diameter of the sealing ring to be polished, and install the holding plate on the second rotating shaft through the quick-install mechanism;

[0020] S2. Place the sealing ring to be polished on a serving tray;

[0021] S3. Adjust the position of the first rotating shaft so that the emery cloth disc rests on the top surface of the sealing ring to be polished; start the driving mechanism to polish the sealing ring.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] (1) By adopting the grinder provided by the present invention, when grinding the sealing ring, the sealing ring is placed on the receiving plate. Since the sandpaper plate is against the top surface of the sealing ring to be ground, the problem of the sealing ring flying out during the grinding process can be effectively avoided.

[0024] (2) Since the first rotating shaft and the second rotating shaft rotate in opposite directions, the gauze disc rotates in the opposite direction relative to the sealing ring placed therein, thereby achieving grinding of the workpiece. The drive mechanism adopted in the present invention is conducive to reducing the overall rotation speed of grinding without affecting the grinding effect, and is conducive to reducing the risk of the workpiece flying out due to high-speed rotation.

[0025] (3) The grinding machine provided by the present invention forms a closed processing environment, which is conducive to avoiding the problem of dust diffusion and reducing pollution to the workshop environment. In addition, the use of a closed environment for processing effectively avoids the occurrence of workpiece injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of an existing grinding machine;

[0028] Figure 2 Schematic diagram of the three-dimensional structure of the grinding machine provided by the present invention Figure 1 ;

[0029] Figure 3 Schematic diagram of the three-dimensional structure of the grinding machine provided by the present invention Figure 2 ;

[0030] Figure 4 A top view of the grinding machine provided by the present invention;

[0031] Figure 5 for Figure 4 Middle AA section view;

[0032] Figure 6 Schematic diagram of the driving mechanism in the present invention;

[0033] Figure 7 Schematic diagram of the quick-install mechanism of the present invention;

[0034] Figure 8 This is an exploded schematic diagram of the quick-loading mechanism and the serving tray of the present invention;

[0035] Figure 9 This is a bottom view of the serving tray of the present invention;

[0036] Figure 10 This is a schematic diagram of the quick-install mechanism of the present invention after removing one expansion sleeve;

[0037] Figure 11 This is a structural schematic diagram of the present invention in which the serving tray is mounted on the upper portion of the second rotating shaft via a quick-install mechanism.

[0038] Explanation of the accompanying figures: 1. Cabinet; 1a. Workbench; 1b. Upper cavity; 1c. Belt cover; 1d. Shaft cover; 1e. Dust suction port; 1f. Observation window; 1g. Operation hole; 1h. Cabinet door; 1j. Horizontal partition; 2. First rotating shaft; 3. Gauze tray; 4. Second rotating shaft; 5. Quick-release mechanism; 5a. Support; 5b. Expansion sleeve; 5c. Second spring; 5d. Expansion bolt; 5e. Support plate; 6. Serving tray ; 6a, expansion sleeve hole; 6b, annular sink; 7, motor; 8, bridge shaft; 9, first belt; 10, second belt; 11, first pulley; 12, driving gear; 13, driven gear; 13a, toggle wheel; 14, second pulley; 15, third pulley; 16, fourth pulley; 17, arc hole; 18, spring seat plate; 19, axial limit plate; 20, handle head; 21, first spring. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Combine Figures 2 to 11As shown, a specific embodiment of a grinder for sealing expansion rings provided by the present invention, the grinder includes a cabinet 1, the cabinet 1 includes a workbench 1a in its inner cavity, and the upper space of the workbench 1a forms a closed upper cavity 1b; a vertical first rotating shaft 2 is installed on the cabinet 1, and the lower end of the first rotating shaft 2 extends into the upper cavity 1b; and an emery cloth disc 3 is provided at the lower end of the first rotating shaft 2, and emery cloth is bonded to the lower surface of the emery cloth disc 3.

[0043] A second rotating shaft 4 is vertically mounted on the workbench 1a, and a loading tray 6 is mounted on the upper end of the second rotating shaft 4 via a quick-install mechanism 5. Figure 5 As shown, a bearing seat is welded on the bottom surface of the workbench 1a, and a bearing is installed in the bearing seat. The second rotating shaft 4 is passed through the inner ring of the bearing, and the upper end of the second rotating shaft 4 passes through the workbench 1a and extends into the upper cavity 1b.

[0044] A driving mechanism is provided inside the cabinet 1 for driving the first rotating shaft 2 and the second rotating shaft 4 to rotate around their own axes respectively. The first rotating shaft 2 and the second rotating shaft 4 rotate in opposite directions.

[0045] Combine Figure 5 and Figure 6 As shown, the driving mechanism includes a motor 7, a bridge shaft 8, a first belt 9 and a second belt 10; the motor 7 is installed in the inner cavity at the lower part of the cabinet 1, and a first pulley 11 and a driving gear 12 are installed on the output shaft of the motor 7 from bottom to top; a second pulley 14 is provided at the lower end of the second rotating shaft 4; the second belt 10 is jointly sleeved on the first pulley 11 and the second pulley 14; a driven gear 13 is provided at the lower end of the bridge shaft 8 for meshing with the driving gear 12; a third pulley 15 is installed on the top of the bridge shaft 8, and a fourth pulley 16 is installed in the middle of the first rotating shaft 2; the first belt 9 is jointly sleeved on the third pulley 15 and the fourth pulley 16.

[0046] Combine Figure 2 and Figure 6 As shown, the cabinet 1 includes a belt cover 1c and a shaft cover 1d arranged in the upper cavity 1b; the belt cover 1c is horizontally installed on the lower surface of the top plate of the cabinet 1; the shaft cover 1d is vertically installed on the workbench 1a, and the left end of the belt cover 1c is connected to the upper end of the shaft cover 1d; the bridge shaft 8 is installed inside the shaft cover 1d; the third pulley 15, the first belt 9, and the fourth pulley 16 are arranged inside the belt cover 1c.

[0047] Combine Figure 2As shown, arc holes 17 corresponding to the upper and lower positions are respectively opened on the top plate of the cabinet 1 and the bottom plate of the belt cover 1c; the center of the arc hole 17 coincides with the axis of the bridge shaft 8; the first rotating shaft 2 is slidably inserted into the arc hole 17. The first rotating shaft 2 can slide up and down in the arc hole (along the Figure 2 Slide up and down in the direction indicated by the arrow C), and at the same time slide along the arc direction of the arc hole 17 (along Figure 2 The front and rear positions and longitudinal positions of the first rotating shaft 2 can be adjusted. When grinding, the emery cloth disc 3 is placed against the top surface of the sealing ring to be ground.

[0048] Combine Figure 2 and Figure 6 As shown, during grinding, in order to ensure that the emery cloth disc 3 is axially pressed against the top surface of the sealing ring to be ground to ensure the grinding effect, the upper part of the first rotating shaft 2 is set as a spline shaft, and the center of the fourth pulley 16 is provided with an inner spline hole and is slidably mounted on the spline shaft of the first rotating shaft 2, that is, the first rotating shaft 2 can slide up and down relative to the fourth pulley 16, but the two cannot rotate relative to each other due to the spline fit. A spring seat plate 18 and an axial limit plate 19 are rotatably mounted on the upper part of the first rotating shaft 2. Specifically, the spring seat plate 18 and the axial limit plate 19 can rotate around the axis of the first rotating shaft 2, but cannot move along the axis of the first rotating shaft 2. A handle head 20 is rotatably mounted on the top end of the first rotating shaft 2. The handle head 20 can rotate around the axis of the first rotating shaft 2, and the handle head 20 cannot be separated from the first rotating shaft 2. A first spring 21 is sleeved on the first rotating shaft 2; the upper end of the first spring 21 abuts against the lower surface of the top plate of the cabinet 1, and the lower end abuts against the spring seat plate 18; the first spring 21 is in a compressed energy storage state to form an axial downward force on the first rotating shaft 2 and push the first rotating shaft 2 downward; in the initial state, there is a gap between the axial limit plate 19 and the upper surface of the top plate of the cabinet 1; when polishing is in place, the axial limit plate 19 abuts against the upper surface of the top plate of the cabinet 1. By adopting the above structure, under the action of the first spring 21, the first rotating shaft 2 can have a tendency to move downward, thereby causing the emery disc 3 to axially press against the top surface of the sealing ring to be polished, which is conducive to improving the polishing effect.

[0049] Combine Figure 6As shown, the lower portion of the bridge shaft 8 is configured as a spline shaft; a toggle wheel 13a is integrally formed on the upper portion of the driven gear 13. The center of the assembly formed by the driven gear 13 and the toggle wheel 13a is provided with an inner spline hole, and is slidably mounted on the spline shaft at the lower portion of the bridge shaft 8; that is, the assembly formed by the driven gear 13 and the toggle wheel 13a can slide axially on the spline shaft at the lower portion of the bridge shaft 8, but cannot rotate relative to each other. An annular groove is provided on the outer circumference of the toggle wheel 13a; a toggle lever (not shown in the figure) is provided inside the cabinet 1, and the toggle lever extends into the annular groove of the toggle wheel 13a, and is used to toggle the assembly formed by the driven gear 13 and the toggle wheel 13a up and down, so that the driven gear 13 and the driving gear 12 are separated or meshed, forming a gear clutch structure.

[0050] Combine Figure 3 As shown, a dust suction port 1e is provided on the rear side wall of the cabinet 1 and is connected to the upper cavity 1b. The dust suction port 1e is used to connect to a dust suction hose of a vacuum cleaner (not shown). The vacuum cleaner is conventional and will not be described in detail here. The dust generated during grinding can be collected by using the vacuum cleaner.

[0051] Combine Figure 1 As shown, an inclined plate is provided on the upper part of the cabinet 1, and an observation window 1f is opened on the inclined plate, and a transparent tempered glass plate is installed on the observation window 1f; two operation holes 1g are opened on the front panel of the cabinet 1, and the operation holes 1g are connected to the upper cavity 1b; openable cabinet doors 1h are provided on the left and right side walls of the upper cavity 1b.

[0052] Combine Figure 1 As shown, the shaft cover 1d separates the upper cavity 1b into two left and right compartments, and the gauze disc 3, the holding tray 6 and other components are located in the right compartment. A transverse partition 1j is provided in the left compartment to divide the left compartment into an upper storage bin and a lower storage bin; the upper storage bin is used to store the sealing rings to be ground, and the lower storage bin is used to store holding trays 6 of different specifications.

[0053] Combine Figures 7 to 11 As shown, the quick-install mechanism 5 includes a bracket 5a, a tightening sleeve 5b, a second spring 5c, a tightening bolt 5d and a support plate 5e; the bracket 5a is integrally formed on the top of the second rotating shaft 4; the second spring 5c and the support plate 5e are both sleeved on the second rotating shaft 4; the two tightening sleeves 5b are arranged in the two countersunk holes of the bracket 5a.

[0054] Each of the expansion sleeves 5b includes a plurality of annularly evenly distributed expansion petals, and an expansion slope is provided on the inner wall surface of the expansion petals; the top of the expansion bolt 5d is provided as an inverted cone-shaped expansion head.

[0055] Two expansion sleeve holes 6a are provided on the containing plate 6; an annular sink 6b is provided on the bottom surface of the containing plate 6; the bracket 5a is inserted into the annular sink 6b of the containing plate 6, and the expansion flap of the expansion sleeve 5b is inserted into the expansion sleeve hole 6a of the containing plate 6.

[0056] The expansion bolt 5d passes through the expansion sleeve 5b and is screwed onto the support plate 5e; the upper end of the second spring 5c rests on the bracket 5a, and the lower end rests on the support plate 5e; and the second spring 5c is in a compressed energy storage state and pushes the support plate 5e downward, so that the support plate 5e pulls the expansion bolt 5d downward. At this time, the expansion head of the expansion bolt 5d pushes the expansion petals of the expansion sleeve 5b to expand outward and rest tightly on the expansion sleeve hole 6a.

[0057] When the serving tray 6 needs to be removed, the operator only needs one hand to push the support plate 5e upward, so that the expansion head of the expansion bolt 5d and the expansion petal of the expansion sleeve 5b are separated from each other, and the expansion petal rebounds and closes by itself. The operator can then lift and remove the serving tray 6 with the other hand.

[0058] On the other hand, the present invention also provides a method for grinding a sealing expansion ring, using the above-mentioned grinding machine, comprising the following steps:

[0059] S1. Select a suitable holding tray 6 according to the outer diameter of the sealing ring to be polished, and install the holding tray 6 on the second rotating shaft 4 through the quick-install mechanism 5;

[0060] S2, placing the sealing ring to be polished on the serving tray 6;

[0061] S3. Adjust the position of the first rotating shaft 2 so that the emery cloth disc 3 abuts against the top surface of the sealing ring to be polished; start the driving mechanism to polish the sealing ring.

[0062] The sealing rings to be polished and the serving trays 6 of different specifications are stored in the upper storage bin and the lower storage bin on the left side of the cabinet 1 .

[0063] In step S1, after selecting the corresponding specification of the holding tray 6 in the lower storage bin on the left side of the cabinet body 1, the cabinet door 1h on the right side of the cabinet body 1 is opened. The operator first pushes the support plate 5e upward with one hand, so that the expansion head of the expansion bolt 5d and the expansion petals of the expansion sleeve 5b are separated from each other, and the expansion petals of the expansion sleeve 5b rebound and close by themselves. At this time, the holding tray 6 can be placed, so that the bracket 5a is inserted into the annular sink 6b at the bottom of the holding tray 6, and the expansion petals of the expansion sleeve 5b are inserted into the expansion sleeve hole 6a of the holding tray 6. Then, the support plate 5e is released, and the second spring 5c pushes the support plate 5e downward, so that the support plate 5e pulls the expansion bolt 5d downward. At this time, the expansion head of the expansion bolt 5d pushes the expansion petals of the expansion sleeve 5b to expand outward and close to the expansion sleeve hole 6a, and the installation of the holding tray 6 is completed.

[0064] The top edge of the serving tray 6 is provided with a flange, and the sealing ring has a notch. The sealing ring is also elastic. Therefore, in step S2, when placing the sealing ring, the operator needs to radially squeeze the sealing ring to close the notch before placing it on the serving tray 6. After releasing the pressure, the sealing ring automatically rebounds and expands outward, so that its outer circumference abuts the inner circumference of the flange on the top of the serving tray 6.

[0065] Combine Figure 2 As shown, in step S3, when adjusting the position of the first rotating shaft 2, the operator can hold the handle head 20 and lift the first rotating shaft 2 upward, driving the gauze disc 2 upward. Then, the first rotating shaft 2 is moved in the direction indicated by arrow B in the figure, so that the abrasive disc 3 is facing the top surface of the workpiece. The handle head 20 is released, and the first rotating shaft 2 is pushed downward by the action of the first spring 21, so that the abrasive disc 3 is closely against the top surface of the sealing ring to be polished.

[0066] In step S3, after one end face of the sealing ring is polished and exposed to light, the first rotating shaft 2 is removed, the sealing ring is turned over and placed on the receiving plate 6 again, and then the above operation is repeated to polish the other side. When polishing is in place, the axial limit plate 19 abuts against the upper surface of the top plate of the cabinet 1. At this time, the first rotating shaft 2 cannot move downward, thereby ensuring the thickness of the workpiece after polishing.

[0067] In addition, in step S3, manual grinding can also be performed. The specific operation is as follows: using the internal lever (not shown in the figure) of the cabinet 1 to shift the shift wheel 13a upward, the combination of the driven gear 13 and the shift wheel 13a moves upward, thereby separating the driven gear 13 from the driving gear 12, and moving the first rotating shaft 2 backward along the arc hole 17. The operator then inserts both hands into the upper cavity 1b through the operation hole 1g on the front side of the cabinet 1, picks up the sanding stick placed on the workbench, and starts manual grinding. During the grinding process, the grinding progress can be observed through the observation window 1f.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A grinding machine for sealing expansion rings, comprising a cabinet (1), characterized in that: The cabinet (1) includes a workbench (1a) in its inner cavity, and the upper space of the workbench (1a) forms a closed upper cavity (1b); A vertical first rotating shaft (2) is installed on the cabinet (1), and the lower end of the first rotating shaft (2) extends into the upper cavity (1b); and an emery cloth disc (3) is provided at the lower end of the first rotating shaft (2), and emery cloth is bonded to the lower surface of the emery cloth disc (3); A second rotating shaft (4) is vertically mounted on the workbench (1a), the upper end of the second rotating shaft (4) extends into the upper cavity (1b), and a holding tray (6) is mounted on the upper end of the second rotating shaft (4) via a quick-install mechanism (5); A driving mechanism is provided inside the cabinet (1) for driving the first rotating shaft (2) and the second rotating shaft (4) to rotate around their own axes, respectively. The first rotating shaft (2) and the second rotating shaft (4) rotate in opposite directions.

2. A grinding machine for sealing expansion ring according to claim 1, characterized in that: The driving mechanism comprises a motor (7), a bridge shaft (8), a first belt (9) and a second belt (10); The motor (7) is installed in the inner cavity of the lower part of the cabinet (1), and a first pulley (11) and a driving gear (12) are installed on the output shaft of the motor (7) in sequence from bottom to top; A second pulley (14) is provided at the lower end of the second rotating shaft (4); the second belt (10) is sleeved on the first pulley (11) and the second pulley (14); A driven gear (13) is provided at the lower end of the bridge shaft (8) for meshing with the driving gear (12); a third pulley (15) is installed on the top of the bridge shaft (8), and a fourth pulley (16) is installed in the middle of the first rotating shaft (2); the first belt (9) is jointly sleeved on the third pulley (15) and the fourth pulley (16).

3. A grinding machine for sealing expansion ring according to claim 2, characterized in that: The cabinet (1) comprises a belt cover (1c) and a shaft cover (1d) arranged in an upper cavity (1b); the belt cover (1c) is horizontally mounted on the lower surface of the top plate of the cabinet (1); the shaft cover (1d) is vertically mounted on the workbench (1a), and the left end of the belt cover (1c) is in communication with the upper end of the shaft cover (1d); The bridge shaft (8) is installed inside the shaft cover (1d); The third pulley (15), the first belt (9), and the fourth pulley (16) are arranged inside the belt cover (1c).

4. A grinding machine for sealing expansion ring according to claim 3, characterized in that: Arc-shaped holes (17) corresponding to upper and lower positions are respectively provided on the top plate of the cabinet (1) and the bottom plate of the belt cover (1c); the center of the arc-shaped hole (17) coincides with the axis of the bridge shaft (8); and the first rotating shaft (2) is slidably inserted into the arc-shaped hole (17).

5. A grinding machine for sealing expansion ring according to claim 4, characterized in that: The upper portion of the first rotating shaft (2) is provided as a spline shaft, and the center of the fourth pulley (16) is provided with an inner spline hole and is slidably sleeved on the spline shaft of the first rotating shaft (2); A spring seat plate (18) and an axial limit plate (19) are rotatably mounted on the upper portion of the first rotating shaft (2), and a handle head (20) is rotatably mounted on the top end of the first rotating shaft (2); a first spring (21) is sleeved on the first rotating shaft (2); The upper end of the first spring (21) abuts against the lower surface of the top plate of the cabinet (1), and the lower end abuts against the spring seat plate (18); the first spring (21) is in a compressed energy storage state for generating an axial downward force on the first rotating shaft (2) and pushing the first rotating shaft (2) to move downward; In the initial state, there is a gap between the axial limit plate (19) and the upper surface of the top plate of the cabinet (1); when polished into place, the axial limit plate (19) abuts against the upper surface of the top plate of the cabinet (1).

6. A grinding machine for sealing expansion ring according to claim 2, characterized in that: The lower part of the bridge shaft (8) is configured as a spline shaft; A shifting wheel (13a) is integrally formed on the upper portion of the driven gear (13); an inner spline hole is provided at the center of the assembly formed by the driven gear (13) and the shifting wheel (13a), and is slidably sleeved on the spline shaft at the lower portion of the bridge shaft (8); An annular groove is provided on the outer peripheral surface of the toggle wheel (13a); a toggle rod is provided inside the cabinet (1), and the toggle rod extends into the annular groove of the toggle wheel (13a) and is used to toggle the assembly formed by the driven gear (13) and the toggle wheel (13a) to move up and down, so that the driven gear (13) and the driving gear (12) are separated or meshed.

7. A grinding machine for sealing expansion ring according to claim 1, characterized in that: A dust suction port (1e) is provided on the rear side wall of the cabinet (1), and the dust suction port (1e) is communicated with the upper cavity (1b); the dust suction port (1e) is used to connect to a dust suction hose of a vacuum cleaner.

8. A grinding machine for sealing expansion ring according to claim 1, characterized in that: An inclined plate is provided on the upper portion of the cabinet (1), and an observation window (1f) is provided on the inclined plate, and a transparent tempered glass plate is installed on the observation window (1f); two operating holes (1g) are provided on the front panel of the cabinet (1), and the operating holes (1g) are communicated with the upper cavity (1b); and openable cabinet doors (1h) are provided on the left and right side walls of the upper cavity (1b).

9. A grinding machine for sealing expansion ring according to claim 1, characterized in that: The quick-install mechanism (5) comprises a support seat (5a), an expansion sleeve (5b), a second spring (5c), an expansion bolt (5d) and a support plate (5e); the support seat (5a) is integrally formed on the top end of the second rotating shaft (4); the second spring (5c) and the support plate (5e) are both sleeved on the second rotating shaft (4); the two expansion sleeves (5b) are arranged in two countersunk holes of the support seat (5a); Each of the expansion sleeves (5b) comprises a plurality of annularly evenly distributed expansion petals, and an expansion slope is provided on the inner wall surface of the expansion petal; the top of the expansion bolt (5d) is provided as an inverted cone-shaped expansion head; Two expansion sleeve holes (6a) are provided on the containing plate (6); an annular sink (6b) is provided on the bottom surface of the containing plate (6); the bracket (5a) is inserted into the annular sink (6b) of the containing plate (6), and the expansion flap of the expansion sleeve (5b) is inserted into the expansion sleeve hole (6a) of the containing plate (6); The expansion bolt (5d) passes through the expansion sleeve (5b) and is screwed onto the support plate (5e); the upper end of the second spring (5c) abuts against the support seat (5a), and the lower end abuts against the support plate (5e); and the second spring (5c) is in a compressed energy storage state and pushes the support plate (5e) downward, so that the support plate (5e) pulls the expansion bolt (5d) downward, and the expansion head of the expansion bolt (5d) pushes the expansion petals of the expansion sleeve (5b) to expand outward and abut against the expansion sleeve hole (6a).

10. A method for polishing a sealing ring, characterized in that: The grinding machine according to any one of claims 1 to 9 comprises the following steps: S1. Select a suitable holding plate (6) according to the outer diameter specification of the sealing ring to be polished, and install the holding plate (6) on the second rotating shaft (4) through the quick-install mechanism (5); S2, placing the sealing ring to be polished on the serving tray (6); S3, adjusting the position of the first rotating shaft (2) so that the emery cloth disc (3) abuts against the top surface of the sealing ring to be polished; starting the driving mechanism to polish the sealing ring.

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