High-strength wear-resistant sprocket and preparation method thereof

Abstract

The application discloses a kind of high-strength wear-resistant sprocket and preparation method thereof, it is related to sprocket manufacturing technical field, to solve the technical problem of low grinding efficiency of traditional grinding equipment to sprocket complex structure, including polishing device, polishing device includes operation platform, operation platform top is equipped with two-way screw rod mechanism and fixed frame;One mobile end of two-way screw rod mechanism is equipped with first rotating mechanism, another mobile end is equipped with second rotating mechanism, first rotating mechanism includes rotating frame, keel tray is detachably inserted in rotating frame, second rotating mechanism includes rotating shaft, sprocket main body is detachably inserted in rotating shaft, the top of fixed frame is rotatably connected with polishing frame, adjusting locking assembly is arranged in the inner cavity of fixed frame, first polishing assembly is arranged in one side wall of polishing frame, and second polishing assembly is arranged in the other side wall.The application has the advantage of greatly improving polishing efficiency.

Description

Technical Field

[0001] This invention relates to the field of sprocket manufacturing technology, and more specifically, to a high-strength wear-resistant sprocket and its preparation method. Background Technology

[0002] In the field of electric vehicle component manufacturing, sprockets, as the core component of the transmission system, play a crucial role in power transmission and torque distribution. Their performance directly affects the driving stability, power output efficiency, and service life of electric vehicles. As electric vehicles develop towards lightweight, long-range, and heavy-duty directions, more stringent requirements are placed on the comprehensive performance of sprockets.

[0003] For manufactured sprockets, surface grinding is required to remove burrs. Existing grinding processes mainly rely on belt grinders or handheld grinding tools. Belt grinders achieve grinding by contacting the workpiece surface with a high-speed rotating belt. Although they can efficiently grind and polish large areas of flat or curved surfaces such as the outer diameter and end faces of the sprocket, quickly removing burrs from these areas, they are limited by the structure and working range of the grinding head. They cannot effectively clean burrs in narrow spaces such as holes and weight reduction grooves on the sidewalls of the sprocket, requiring additional processing methods. Handheld grinding tools such as angle grinders and electric grinders can target narrow areas that belt grinders cannot reach by changing small grinding heads and polishing wheels. However, their operation is highly dependent on human experience, which can easily lead to incomplete or over-grinding. They also require a lot of time for manual operation and quality re-inspection. The limitations of both types of equipment result in low overall grinding efficiency. In view of this, we propose a high-strength wear-resistant sprocket and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength wear-resistant sprocket and its preparation method, so as to solve the technical problem of low grinding efficiency of traditional grinding equipment for complex sprocket structures.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-strength wear-resistant sprocket, comprising a sprocket body, wherein the symmetrical two side walls of the sprocket body are provided with weight-reducing grooves of the same structure, and the side walls of the weight-reducing grooves are provided with multiple connecting holes II; each weight-reducing groove is fitted with a keel plate, the keel plate being an annular plate structure made of alloy steel, and the side wall being provided with multiple connecting holes I corresponding to the positions of the connecting holes II.

[0006] A method for manufacturing a high-strength, wear-resistant sprocket, comprising the following steps: S1. Billet preparation: Alloy structural steel is selected as the raw material; S2. Forging process: The raw material heated to a plastic state is forged into sprocket body blank and keel plate blank through forging equipment. After forging, it is cooled to room temperature by air cooling. S3. Rough machining: After the billet cools, the outline is first machined by turning on a lathe and milling on a milling machine, and then the oxide scale on the surface of the billet is removed by pickling. S4. Heat treatment: The rough-machined billet is placed in a heat treatment furnace and subjected to normalizing and tempering treatments in sequence. S5. Finishing: Perform precision turning and precision milling operations on the heat-treated billet in sequence. S6. Surface treatment: The sprocket body and keel disc after precision machining are subjected to surface strengthening treatment by carburizing and quenching process. S7. Post-processing: Temper the surface-treated sprocket body and keel disc, then polish them with a grinding device to remove burrs from the surface of the sprocket body and keel disc. After cleaning, the finished sprocket is obtained after passing the final inspection.

[0007] Preferably, the polishing device includes an operating table, on the top of which is mounted a bidirectional lead screw mechanism and a fixing frame; a first rotating mechanism is mounted on one moving end of the bidirectional lead screw mechanism, and a second rotating mechanism is mounted on the other moving end; the fixing frame is arranged between the first rotating mechanism and the second rotating mechanism; the first rotating mechanism includes a rotating frame, on which the keel plate is detachably inserted; the second rotating mechanism includes a rotating shaft, on which the sprocket body is detachably inserted; a polishing frame is rotatably connected to the top of the fixing frame, and an adjustment and locking assembly is arranged in the inner cavity of the fixing frame; a first polishing assembly is arranged on one side wall of the polishing frame, and a second polishing assembly is arranged on the other side wall.

[0008] Preferably, the first rotating mechanism further includes a base mounted on the top of the moving end of the bidirectional screw mechanism. Multiple sliding rods are mounted on the top of the base, and a frame is slidably arranged on each sliding rod. A spring is also sleeved on each sliding rod. A first motor is mounted on the top of the frame, and the output end of the first motor is connected to the rotating frame. The rotating frame includes multiple support rods, and insertion rods are connected to the ends of the support rods. The insertion rods can form an insertion engagement with the connecting holes of the keel plate, and a magnetic block is mounted on the outer circumference of the insertion rod. The second rotating mechanism has the same motor drive structure as the first rotating mechanism, and the motor output end of the second rotating mechanism is connected to the rotating shaft.

[0009] Preferably, a second motor is mounted on the top of the grinding frame, and a gear transmission assembly is arranged inside it; the first grinding assembly includes a long cylindrical grinding head and a stacked cylindrical grinding head; the second grinding assembly includes a short cylindrical grinding head and a long stacked grinding head; the power output by the second motor is transmitted through the gear transmission assembly, which can drive the grinding heads of the first grinding assembly and the second grinding assembly to synchronously perform rotational grinding actions; a driving component is connected to the bottom of the grinding frame, the driving component movably passes through the top of the fixed frame and extends into the inner cavity, the driving component includes a driving column, and a driving cylinder is rotatably arranged on the outer circumference of the driving column.

[0010] Preferably, the adjustment and locking assembly includes an adjustment member connected to the side wall of the base, the adjustment member being slidably arranged at the bottom of the inner cavity of the fixing frame; the adjustment member includes a fixed plate and a movable plate, the top of the fixed plate having multiple straight grooves and a movable groove, the movable groove being arranged between two straight grooves; the movable plate is slidably arranged in the movable groove, the top of the movable plate having a straight groove and a semi-circular groove, the top of the movable plate being connected to multiple locking pins; the two straight grooves can be connected to each other through the semi-circular groove, and when the movable plate slides from one end to the other end in the movable groove, the two straight grooves can be connected to each other through the straight groove; the drive cylinder is movably arranged in the straight groove.

[0011] Preferably, the adjustment and locking assembly further includes a control lock installed in the inner cavity of the fixing frame, the control lock being arranged above the adjustment member; the control lock includes a base plate, a plurality of guide plates are connected to the bottom of the base plate, the two ends of the guide plates are configured with mutually parallel inclined surface structures, an inclined guide channel is formed between every two guide plates, and the inclined surface structure at the end of the guide plate forms a structural channel with the inner sidewall of the base plate that is the same as the inclined guide channel, and a straight guide channel is formed between the guide plate and another inner sidewall of the base plate, and there are multiple straight guide channels; the locking pin is movably arranged in the straight guide channel and can enter another straight guide channel through the inclined guide channel.

[0012] Preferably, a variable track plate is rotatably arranged inside the guide plate cavity. One end of the variable track plate is connected to a reset plate, and the other end of the variable track plate is set with an angled structure. An arc-shaped column is connected to the inner side wall of the guide plate, and a reset spring is sleeved on the arc-shaped column. The reset plate is slidably arranged on the arc-shaped column, and one end of the reset spring is connected to the inner side wall of the guide plate and the other end is connected to the side wall of the reset plate. The arc of the arc-shaped column and the rotation trajectory of the variable track plate are concentric circles.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides a weight-reducing groove on the side wall of the sprocket body. The weight-reducing groove not only provides an installation space for the alloy steel keel plate with reinforcing ribs, but also plays a weight-reducing role when the keel plate is disassembled, thus meeting the lightweight transmission requirements in low-load and light-duty scenarios. When applied to high-load and heavy-duty scenarios, the two keel plates are fixed in the weight-reducing groove, forming an integrated load-bearing structure with the sprocket body, which greatly improves the overall strength to cope with heavy-duty transmission pressure and achieves efficient adaptation of a single sprocket under different load conditions.

[0014] 2. This invention improves upon existing processes by designing a grinding device. This device positions the keel disc using a rotating frame and the sprocket body using a rotating shaft. A first grinding component grinds the inner and outer circumferential walls of the keel disc, while a second grinding component grinds the inner wall of the weight-reducing groove in the sprocket body. After initial grinding is complete, an adjustment and locking component drives the grinding frame to rotate and lock. At this point, the first grinding component switches to the sprocket body side for precise grinding of its sidewalls, while the second grinding component switches to the keel disc side for comprehensive grinding of its sidewalls. The entire process eliminates the need for frequent manual adjustments to the workpiece position or changes in grinding tools, enabling automated grinding of multiple parts of the keel disc and sprocket body. This solves the problem of traditional belt sanders failing to grind narrow areas like the weight-reducing grooves effectively, and avoids the shortcomings of handheld grinding tools that rely on manual experience and have poor precision, significantly improving grinding efficiency and processing quality.

[0015] 3. This invention arranges the ends of the long cylindrical grinding head and the stacked cylindrical grinding head at different lengths, while the ends of the short cylindrical grinding head and the long stacked grinding head are arranged coplanarly. When the initial grinding is completed, the grinding frame rotates, and the arrangement of the ends of the long cylindrical grinding head and the stacked cylindrical grinding head at different lengths allows their ends to adapt to the protruding structural shape of the sprocket body sidewall, resulting in a comprehensive grinding effect on the sprocket body sidewall. Furthermore, the coplanar arrangement of the ends of the short cylindrical grinding head and the long stacked grinding head allows their ends to adapt to the planar structural shape of the keel disc sidewall, resulting in a comprehensive grinding effect on the keel disc sidewall. This solves the problem that when the grinding head positions are interchanged, the grinding head cannot adapt to the different sidewall structures of the sprocket body and the keel disc sidewall, which have different structural shapes.

[0016] 4. This invention, through the design of an adjusting component, allows for the switching of the grinding head position by rotating the grinding frame after the initial grinding stage. This is achieved simply by linear movement of the first rotating mechanism, pulling the adjusting component to slide synchronously within the fixed frame cavity. The drive cylinder, movably arranged within the straight groove, can slide along the straight groove and change direction via the semi-circular groove, thereby driving the grinding frame to rotate. When the first and second rotating mechanisms move synchronously towards each other, the first rotating mechanism again pushes the adjusting component to slide synchronously back to its original position within the fixed frame cavity. At this time, the movable plate can slide to the other end within the movable groove, connecting the two straight grooves through the second straight groove, thus enabling the drive cylinder to... Confined within the straight channel formed by straight groove one and straight groove two, the grinding frame remains in its rotated state and cannot rotate further, thus stably locking the grinding frame at the target position after rotation. This design does not require an additional rotation drive source; the rotation switching of the grinding frame is achieved solely through the reciprocating movement of the first rotating mechanism. Furthermore, the switching between different connection states is achieved through a movable plate, ensuring that the grinding frame can complete its rotational movement as the first rotating mechanism moves away from the grinding frame, and can stably maintain its rotated state as it moves closer to the grinding frame. This solves the problem that the semi-circular groove can easily cause the grinding frame to rotate again during the movement of the first rotating mechanism towards the grinding frame.

[0017] 5. The present invention also includes a control lock above the adjusting member. The locking pin is initially positioned within the straight guide channel of the base plate. During the initial stage when the first rotating mechanism moves away from the grinding frame, the adjusting member is pulled to slide synchronously within the fixed frame cavity. At this time, the locking pin is guided by the side wall of the guide plate and enters the inclined guide channel. Furthermore, guided by the inclined guide channel, it drives the movable plate to slide to the other end within the movable groove, thus connecting the two straight grooves via a semi-circular groove. The driving cylinder arranged within the straight groove then drives the grinding frame to rotate. Similarly, when the first rotating mechanism returns and moves closer to the grinding frame, the locking pin is guided by the side wall of the guide plate and enters the inclined guide channel. The movable plate is driven to reset within the movable slot until the locking pin enters another straight guide channel through the inclined guide channel, thus locking the movement of the movable plate. After the movable plate resets, the two straight slots pass through the straight channel formed by the two straight slots again, ensuring the locking of the grinding frame's state. This achieves automated and precise control of the movable plate's movement and reset within the movable slot. No additional manual operation or independent drive source is required. The state switching between the connection between straight slot one and the semi-circular slot and between straight slot one and straight slot two can be completed simultaneously, ensuring that the working state before and after the grinding frame rotates can be reliably maintained. This avoids situations where the drive cylinder movement is stuck, the grinding frame cannot rotate smoothly, or the locking fails due to the positional deviation of the movable plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the sprocket of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the sprocket body and the keel disc of the present invention; Figure 3 This is a schematic diagram of the overall structure of the polishing device of the present invention; Figure 4 This is a schematic diagram showing the disassembled structure of the first rotating mechanism, the fixed frame, and the second rotating mechanism of the present invention; Figure 5 This is a schematic diagram of the disassembled base and frame structure of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the fixing frame and the grinding frame of the present invention; Figure 7 This is a schematic diagram of the gear transmission assembly inside the grinding frame of the present invention. Figure 8 This is a schematic diagram of a grinding state structure according to the present invention; Figure 9 This is a schematic diagram of another polishing state structure according to the present invention; Figure 10 This is a schematic diagram of the grinding area of ​​the short cylindrical grinding head and the long stacked grinding head of the present invention; Figure 11 This is a cross-sectional view of the fixing frame structure of the present invention; Figure 12 This is a schematic diagram of the disassembled structure of the fixed plate and the movable plate of the present invention; Figure 13 This is a schematic diagram of the movable plate and substrate structure of the present invention; Figure 14 This is a schematic diagram of the substrate cross-section structure of the present invention; Figure 15 This is a schematic diagram of the track-changing plate structure of the present invention; Figure 16 This is a schematic diagram of one usage state of the movable plate of the present invention; Figure 17 This is a schematic diagram illustrating another usage state of the movable plate of the present invention.

[0019] Explanation of the labels in the diagram: 1. Sprocket body; 2. Keel plate; 3. Control panel; 4. Two-way lead screw mechanism; 5. Fixing frame; 6. First rotating mechanism; 7. Second rotating mechanism; 8. Grinding frame; 9. Adjustment and locking assembly; 101. Weight reduction groove; 102. Connection hole two; 201. Reinforcing rib; 202. Connecting hole one; 601, Rotating frame; 6011, Support rod; 6012, Insert rod; 6013, Magnetic block; 602, Base; 603, Slide rod; 604, Frame; 605, Spring; 606, First motor; 701. Rotating shaft; 81. First grinding assembly; 82. Second grinding assembly; 83. Second motor; 84. Drive component; 8101, Long cylindrical grinding head; 8102, Stacked cylindrical grinding head; 8201, Short cylindrical grinding head; 8202, Long stacked grinding head; 8401, Drive cylinder; 91. Adjusting component; 92. Control locking component; 9101. Fixed plate; 9102. Movable plate; 9103. Straight groove one; 9104. Movable groove; 9105. Straight groove two; 9106. Semi-circular groove; 9107. Locking post; 9201. Base plate; 9202. Guide plate; 9203. Inclined guide channel; 9204. Straight guide channel; 9205. Track changing plate; 9206. Reset plate; 9207. Arc-shaped post; 9208. Reset spring. Detailed Implementation

[0020] Example 1, as Figures 1 to 2 As shown, this embodiment provides a high-strength wear-resistant sprocket, including a sprocket body 1. The sprocket body 1 has symmetrical side walls with identical weight-reducing grooves 101. Multiple connecting holes 102 are formed through the side walls of the weight-reducing grooves 101. Each weight-reducing groove 101 is fitted with a keel plate 2, which is an annular plate structure made of alloy steel. Multiple reinforcing ribs 201 are arranged on the side walls of the keel plate 2 to improve its structural strength. Multiple connecting holes 102 are also provided on the side walls. The corresponding connection hole 1 202; the two keel discs 2 are detachably connected to the weight reduction grooves 101 on both sides of the sprocket body 1 through bolt and nut assemblies that pass through the corresponding connection hole 1 202 and connection hole 2 102 respectively; when the sprocket body 1 is used in a low-load, light-working-condition transmission scenario, the keel discs 2 are in a disassembled state, so that the sprocket body 1 has lightweight characteristics; when the sprocket body 1 is used in a high-load, heavy-load transmission scenario, the keel discs 2 are in an assembled state, which is used to improve the overall strength of the sprocket body 1. This invention provides a weight-reducing groove 101 on the side wall of the sprocket body 1. The weight-reducing groove 101 not only provides an installation space for the alloy steel sprocket disc 2 with reinforcing ribs 201, but also plays a weight-reducing role when the sprocket disc 2 is disassembled, thus meeting the lightweight transmission requirements in low-load and light-duty scenarios. When applied to high-load and heavy-duty scenarios, the two sprocket discs 2 are fixed in the weight-reducing groove 101, forming an integrated load-bearing structure with the sprocket body 1, which greatly improves the overall strength to cope with heavy-duty transmission pressure and achieves efficient adaptation of a single sprocket under different load conditions.

[0021] Example 2: This example provides a method for preparing a high-strength, wear-resistant sprocket, used to manufacture the sprocket described in Example 1, comprising the following steps: S1. Billet preparation: Alloy structural steel is selected as the raw material. The alloy structural steel is prepared from the following components by weight percentage: carbon 0.35-0.50%, silicon 0.20-0.40%, chromium 1.80-3.50%, nickel 1.4-1.9%, molybdenum 0.35-1.80%, vanadium 0.10-0.40%, niobium 0.02-0.06%, aluminum 0.02-0.06%, rhenium 0.01-0.02%, manganese 0.50-0.80%, phosphorus ≤0.025%, sulfur ≤0.015%, with the balance being iron powder and unavoidable impurities. S2. Forging process: The raw material heated to a plastic state is forged into sprocket body 1 blank and keel plate 2 blank through forging equipment. The forging temperature is 850-1100℃. After forging, it is cooled to room temperature by air cooling. By controlling the forging temperature of alloy structural steel at 850-1100℃, the forging process can effectively break the casting structure and refine the grains. Air cooling can avoid structural stress cracking caused by rapid cooling, ensuring that the structure of the blank is uniform and dense, laying a good foundation for subsequent processing and heat treatment. S3. Rough machining: After the sprocket body 1 blank and the keel plate 2 blank are cooled, the outer circle, end face, and hub hole structure of the sprocket body 1 blank and the outer circle and inner circle structure of the keel plate 2 blank are respectively machined by lathe. Then, the tooth blank contour of the sprocket body 1 blank and the reinforcing rib 201 structure contour of the keel plate 2 blank are milled by milling machine. By first turning the outer circle, end face, and hub hole, and then milling the tooth blank contour, the oxide scale and excess material on the surface of the blank are removed by pickling process to avoid the oxide scale from penetrating into the metal matrix during heat treatment and affecting the heat treatment quality. S4. Heat treatment: The rough-machined billet is placed in a heat treatment furnace and subjected to normalizing and quenching / tempering treatments in sequence. The normalizing temperature is 880-920℃, held for 2-4 hours and then air-cooled. The quenching / tempering temperature is 820-860℃, held for 3-5 hours and then oil-cooled, so that the billet hardness reaches 220-280HBW, improving the comprehensive mechanical properties of the billet. The combination of normalizing and quenching / tempering is highly targeted. Normalizing can refine grains, eliminate forging stress, and improve machinability. Quenching / tempering can obtain a tempered sorbite structure with excellent comprehensive mechanical properties and a hardness range of 220-280HBW, taking into account both the machinability of subsequent finishing and the load-bearing capacity of the sprocket. S5. Finishing: The heat-treated sprocket body 1 blank and keel disc 2 blank are respectively subjected to precision turning, precision milling and tooth profile finishing operations; the hub hole is precision bored to the design size by a boring machine, the keyway is machined by a milling machine, the two end faces of the sprocket are precision turned, and the tooth tip, tooth root and outer circle edge of the sprocket are chamfered to eliminate sharp edges. The tooth profile is machined by a gear hobbing machine, and the tooth surface roughness parameter Ra≤1.6μm; S6. Surface treatment: The sprocket body 1 and the keel plate 2 after precision machining are subjected to surface strengthening treatment by carburizing and quenching process. The carburizing and quenching temperature is 880-900℃, and the heat is held for 4-6 hours before quenching and cooling. S7. Post-processing: Tempering is performed on the surface-treated sprocket body 1 and keel disc 2. Then, grinding is performed by a grinding device to remove burrs from the surfaces of the sprocket body 1 and keel disc 2. After cleaning, the finished sprocket is obtained after passing the final inspection.

[0022] Example 3, as Figures 3 to 17 As shown, this embodiment provides a grinding device, which includes an operating table 3. A bidirectional lead screw mechanism 4 and a fixed frame 5 are mounted on the top of the operating table 3. The bidirectional lead screw mechanism 4 is a conventional transmission structure consisting of a drive motor, a bidirectional lead screw, two moving ends, and a guide rail. A first rotating mechanism 6 is mounted on one moving end of the bidirectional lead screw mechanism 4, and a second rotating mechanism 7 is mounted on the other moving end. The fixed frame 5 is arranged between the first rotating mechanism 6 and the second rotating mechanism 7. The first rotating mechanism 6 includes a rotating frame 601, and a keel plate 2 is detachably inserted into the rotating frame 601. The second rotating mechanism 7 includes a rotating shaft 701, and a sprocket body 1 is detachably inserted into the rotating shaft 701. A grinding frame 8 is rotatably connected to the top of the fixed frame 5, and an adjustment mechanism is arranged inside the fixed frame 5. Section locking component 9; a first grinding component 81 is arranged on one side wall of the grinding frame 8 and a second grinding component 82 is arranged on the other side wall; the adjustment locking component 9 is used to drive the grinding frame 8 to rotate 180° and lock the grinding frame 8 in the target position after rotation; the adjustment locking component 9 is used to control the grinding frame 8 to rotate 180° and form a locked state; when the grinding frame 8 is in the initial position, the first grinding component 81 can grind the inner and outer circumferential walls of the keel plate 2, and the second grinding component 82 can grind the inner wall of the weight reduction groove 101 of the sprocket body 1; when the grinding frame 8 rotates 180°, the first grinding component 81 can grind the side wall of the sprocket body 1, and the second grinding component 82 grinds the side wall of the keel plate 2.

[0023] This invention improves upon existing processes by designing a grinding device. This device positions the keel disc 2 via a rotating frame 601 and the sprocket body 1 via a rotating shaft 701. A bidirectional lead screw mechanism 4 drives two moving ends to move in opposite directions, causing the first rotating mechanism 6 and the second rotating mechanism 7 to move towards each other. This further enables the first grinding component 81 to grind the inner and outer circumferential walls of the keel disc 2, while the second grinding component 82 grinds the inner wall of the weight-reducing groove 101 of the sprocket body 1. After the initial grinding is completed, the locking component is adjusted. The 9-drive grinding frame 8 rotates 180° and locks. At this time, the first grinding component 81 switches to the side of the sprocket body 1 to perform precise grinding on its side wall, and the second grinding component 82 switches to the side of the keel plate 2 to perform comprehensive grinding on its side wall. The whole process can complete the automated grinding of multiple parts of the keel plate 2 and the sprocket body 1 without the need for frequent manual adjustment of the workpiece position or replacement of grinding tools. This solves the problem of traditional belt sanders not being able to grind small areas such as the weight reduction groove 101 properly, and avoids the defects of handheld grinding tools that rely on manual experience and have poor precision, thus greatly improving grinding efficiency and processing quality.

[0024] In another embodiment of the present invention, the first rotating mechanism 6 further includes a base 602 mounted on the top of the moving end of the bidirectional lead screw mechanism 4. Multiple slide rods 603 are mounted on the top of the base 602. A frame 604 is slidably arranged on the slide rods 603. A spring 605 is also sleeved on the slide rods 603, with one end of the spring 605 abutting against the base 602 and the other end abutting against the frame 604. A first motor 606 is mounted on the top of the frame 604. The output end of the first motor 606 is connected to the rotating frame 601. The rotating frame 601 includes multiple support rods 6011. Insert rods 6012 are connected to the ends of the support rods 6011. The insert rods 6012 can form a plug-in engagement with the connection hole 202 of the keel plate 2. A magnetic block 6013 is installed on the outer circumference of the keel plate 2. The magnetic block 6013 is used to attract the keel plate 2. The second rotating mechanism 7 is arranged with the same motor drive structure as the first rotating mechanism 6. The motor output end of the second rotating mechanism 7 is connected to the rotating shaft 701. The rotating shaft 701 can form a plug-in fit with the keyway structure of the inner hole of the sprocket body 1. When the keel plate 2 is installed on the insertion rod 6012 of the rotating frame 601 and the sprocket body 1 is installed on the rotating shaft 701, the two rotating mechanisms are driven to move towards each other by the bidirectional screw mechanism 4, so that the keel plate 2 enters the grinding station of the first grinding component 81 and the sprocket body 1 enters the grinding station of the second grinding component 82, so as to realize the synchronous grinding operation of the keel plate 2 and the sprocket body 1.

[0025] In this invention, the spring 605 of the first rotating mechanism 6 is designed such that one end abuts against the base 602 and the other end abuts against the frame 604. The second rotating mechanism 7 is designed similarly. This allows the keel disc 2 to enter the grinding station of the first grinding assembly 81, and the sprocket body 1 to simultaneously enter the grinding station of the second grinding assembly 82. The sprocket body 1 and the grinding head of the second grinding assembly 82 form a pressing contact. At this time, the spring of the second rotating mechanism 7 is compressed, preventing the sprocket body 1 from directly contacting the second grinding assembly 82. The rigid compression of the grinding head makes grinding difficult. However, when the first rotating mechanism 6 and the second rotating mechanism 7 move synchronously in opposite directions to provide rotation space for the grinding frame 8, they move towards each other again, so that the sprocket body 1 enters the grinding station of the first grinding assembly 81 for side wall grinding, and the keel plate 2 enters the grinding station of the second grinding assembly 82 for side wall grinding. At this time, the spring springs of the first rotating mechanism 6 and the second rotating mechanism 7 are compressed, which avoids the rigid pressure between the workpiece and the grinding head.

[0026] In another embodiment of the present invention, a second motor 83 is mounted on the top of the grinding frame 8, and a gear transmission assembly is arranged inside it. The gear transmission assembly consists of... Figure 7 As shown, the conventional arrangement of multiple grinding heads for synchronous rotation is not elaborated here. The power output from the second motor 83 is transmitted through a gear transmission assembly, which can drive the grinding heads of the first grinding assembly 81 and the second grinding assembly 82 to synchronously perform rotational grinding actions. The first grinding assembly 81 includes a long cylindrical grinding head 8101 and a stacked cylindrical grinding head 8102. The sidewall of the long cylindrical grinding head 8101 is fitted with the outer circumferential wall of the keel plate 2, and the stacked cylindrical grinding head 8102 is fitted with the inner circumferential wall structure of the keel plate 2. The long cylindrical grinding head 8101 and the stacked cylindrical grinding head 8102 are fitted with each other. The ends of the head 8102 are arranged with a difference in length position; the second grinding assembly 82 includes a short cylindrical grinding head 8201 and a long stacked grinding head 8202. The short cylindrical grinding head 8201 is arranged to fit against the long diameter circular wall of the weight reduction groove 101, and the long stacked grinding head 8202 is arranged to fit against the short diameter circular wall of the weight reduction groove 101. When the sprocket body 1 rotates, the movement trajectories of the ends of the short cylindrical grinding head 8201 and the long stacked grinding head 8202 in the weight reduction groove 101 can form an intersection area, and the ends of the short cylindrical grinding head 8201 and the long stacked grinding head 8202 are arranged in a coplanar manner.

[0027] This invention arranges the ends of the long cylindrical grinding head 8101 and the stacked cylindrical grinding head 8102 at a difference in length, while the ends of the short cylindrical grinding head 8201 and the long stacked grinding head 8202 are arranged coplanarly. When the grinding frame 8 is in the initial position, as the keel disc 2 rotates, the sidewall of the rotating long cylindrical grinding head 8101 can grind the outer circumference of the keel disc 2, while the rotating stacked cylindrical grinding head 8102 grinds the inner circumference of the keel disc 2. Furthermore, when the sprocket body 1 rotates, the movement trajectories of the ends of the short cylindrical grinding head 8201 and the long stacked grinding head 8202 within the weight reduction groove 101 can form an intersection area, thus achieving grinding of the weight reduction groove 101. 1. All-round grinding of the inner wall: When the grinding frame 8 rotates 180°, the difference in length of the ends of the long columnar grinding head 8101 and the stacked columnar grinding head 8102 allows the ends of the two heads to adapt to the protruding structural shape of the side wall of the sprocket body 1, forming a comprehensive grinding effect on the side wall of the sprocket body 1. In addition, the ends of the short columnar grinding head 8201 and the long stacked grinding head 8202 are arranged in a coplanar manner, allowing the ends of the two heads to adapt to the planar structural shape of the side wall of the keel plate 2, forming a comprehensive grinding effect on the side wall of the keel plate 2. This solves the problem that the grinding head is difficult to adapt to the side wall structure of the sprocket body 1 and the keel plate 2 when their positions are interchanged due to the different structural shapes of the side wall.

[0028] In another embodiment of the present invention, a driving member 84 is connected to the bottom of the grinding frame 8. The driving member 84 movably passes through the top of the fixed frame 5 and extends into the inner cavity. The driving member 84 includes a driving column, and a driving cylinder 8401 is rotatably arranged on the outer circumference of the driving column.

[0029] In another embodiment of the present invention, the adjustment locking assembly 9 includes an adjustment member 91 connected to the side wall of the base 602. The adjustment member 91 is slidably arranged at the bottom of the inner cavity of the fixed frame 5. The adjustment member 91 can follow the linear movement of the first rotating mechanism 6 on the moving end of the bidirectional screw mechanism 4 and slide synchronously in the inner cavity of the fixed frame 5. The adjustment member 91 includes a fixed plate 9101 and a movable plate 9102. The top of the fixed plate 9101 is provided with a plurality of straight grooves 9103 and movable grooves 9104. The movable grooves 9104 are arranged between two straight grooves 9103. The movable plate 9102 is slidably arranged in the movable groove 9104. The top of the movable plate 9102 is provided with a straight groove 9105 and a semi-circular groove 9106. Multiple locking pins 9107 are connected to the top of the movable plate 9102. The two straight grooves 9103 can be connected to each other through the semi-circular groove 9106. When the movable plate 9102 slides from one end to the other in the movable groove 9104, the two straight grooves 9103 can be connected to each other through the straight groove 9105. The drive cylinder 8401 is movably arranged in the straight groove 9103.

[0030] This invention designs an adjusting component 91, in which two straight grooves 9103 of the fixed plate 9101 are connected to different states via a movable plate 9102 within a movable groove 9104. Initially, the movable plate 9102 is positioned at one end of the movable groove 9104, and the two straight grooves 9103 are connected via a semi-circular groove 9106. When the initial grinding stage is completed, and the grinding frame 8 needs to rotate 180° to switch the position of the grinding head, this can be achieved by controlling the first rotating mechanism 6 and the second rotating mechanism via a bidirectional screw mechanism 4. The first rotating mechanism 6 moves synchronously in opposite directions, providing rotational space for the grinding frame 8. When the first rotating mechanism 6 moves linearly, it can pull the adjusting member 91 to slide synchronously within the cavity of the fixed frame 5. The drive cylinder 8401, movably arranged within the straight groove 9103, can slide along the straight groove 9103 and change direction through the semi-circular groove 9106, thereby driving the grinding frame 8 to complete a 180° rotation. When the first rotating mechanism 6 and the second rotating mechanism 7 move synchronously in opposite directions, the first rotating mechanism 6... The adjusting member 91 is pushed again to slide and reset synchronously within the cavity of the fixed frame 5. At this time, the movable plate 9102 can slide to the other end within the movable groove 9104, so that the two straight grooves 9103 are connected through the straight groove 9105. The drive cylinder 8401 is confined within the straight channel formed by the straight groove 9103 and the straight groove 9105, so that the grinding frame 8 remains in the state after 180° rotation and cannot rotate. The grinding frame 8 is stably locked in the target position after rotation. This design does not require an additional rotation drive source. The rotation switching of the grinding frame 8 is achieved only by the reciprocating movement of the first rotating mechanism 6. Furthermore, the switching of different connection states is achieved by the movable plate 9102, ensuring that the grinding frame 8 can complete the rotation movement when the first rotating mechanism 6 moves away from the grinding frame 8, and can stably maintain the state after rotation when it moves towards the grinding frame 8. This solves the problem that the semi-circular groove 9106 can easily cause the grinding frame 8 to rotate again during the movement of the first rotating mechanism 6 towards the grinding frame 8.

[0031] The present invention also designs a straight groove 9103 so that in the initial stage when the first rotating mechanism 6 is away from the grinding frame 8, the drive cylinder 8401 remains in the straight groove 9103. Due to the shape of the straight groove 9103, the grinding frame 8 does not rotate, thus avoiding the problem of motion interference caused by the first rotating mechanism 6 being too close to the grinding frame 8 in the initial stage. The grinding frame 8 only begins to rotate after the drive cylinder 8401 enters the semi-circular groove 9106.

[0032] In another embodiment of the present invention, the adjusting locking assembly 9 further includes a control lock 92 installed in the inner cavity of the fixing frame 5, the control lock 92 being arranged above the adjusting member 91; the control lock 92 includes a base plate 9201, a plurality of guide plates 9202 are connected to the bottom of the base plate 9201, the two ends of the guide plates 9202 are set with mutually parallel inclined surface structures, an inclined guide channel 9203 is formed between every two guide plates 9202, and the inclined surface structure at the end of the guide plate 9202 forms a structural channel with the inner sidewall of the base plate 9201 that is the same as the inclined guide channel 9203, a straight guide channel 9204 is formed between the guide plate 9202 and another inner sidewall of the base plate 9201, and there are multiple straight guide channels 9204; the locking pin 9107 is movably arranged in the straight guide channel 9204 and can enter another straight guide channel 9204 through the inclined guide channel 9203; the guide plate 9202 A guide plate 9205 is rotatably arranged inside the cavity. One end of the guide plate 9205 is connected to a reset plate 9206, and the other end of the guide plate 9205 is set with an angled structure. An arc-shaped column 9207 is connected to the inner wall of the guide plate 9202. A reset spring 9208 is sleeved on the arc-shaped column 9207. The reset plate 9206 is slidably arranged on the arc-shaped column 9207, and one end of the reset spring 9208 is connected to the inner wall of the guide plate 9202, and the other end is connected to the reset plate. The sidewall of 9206 is connected, and the arc of the arc-shaped column 9207 is concentric with the rotation trajectory of the guide plate 9205. The return spring 9208 can generate elastic force on the return plate 9206 and drive the guide plate 9205 to rotate and return until the angled structure at one end of the guide plate 9205 forms a pressing contact with the inner sidewall of the straight guide channel 9204, and the sidewall of the guide plate 9205 forms a linear alignment with the sidewall of the inclined guide channel 9203.

[0033] The present invention also provides a control lock 92 above the adjusting member 91. The locking pin 9107 is initially positioned within the straight guide channel 9204 of the base plate 9201. During the initial stage when the first rotating mechanism 6 moves away from the grinding frame 8, the adjusting member 91 is pulled to slide synchronously within the cavity of the fixed frame 5. At this time, the locking pin 9107 is guided by the side wall of the guide plate 9205 and enters the inclined guide channel 9203. Furthermore, guided by the inclined guide channel 9203, it drives the movable plate 9102 to slide to the other end within the movable groove 9104, thus connecting the two straight grooves 9103 via the semi-circular groove 9106. The driving cylinder 8401, arranged within the straight groove 9103, drives the grinding frame 8 to complete a 180° rotation. When the first rotating mechanism 6 returns and moves closer to the grinding frame 8, similarly, the locking pin 9107 is guided by the side wall of the guide plate 9205 and enters the inclined guide channel 9204. 203, driving the movable plate 9102 to reset within the movable slot 9104 until the locking pin 9107 enters another straight guide channel 9204 through the inclined guide channel 9203, completing the locking of the movement of the movable plate 9102. After the movable plate 9102 resets, the two straight slots 9103 pass through the straight channel formed by the straight slot 9105 again, ensuring the locking of the state of the grinding frame 8. This achieves automated and precise control of the movement and reset of the movable plate 9102 within the movable slot 9104. Without additional manual operation or an independent drive source, the state switching between the connection of the straight slot 9103 and the semi-circular slot 9106 and the connection between the straight slot 9103 and the straight slot 9105 can be completed simultaneously, ensuring that the working state of the grinding frame 8 can be reliably maintained before and after rotation. This avoids the situation where the drive cylinder 8401 is stuck due to the positional deviation of the movable plate 9102, the grinding frame 8 cannot rotate smoothly, or the locking fails.

[0034] The present invention further includes a variable track plate 9205 rotatably arranged inside the guide plate 9202. When the locking pin 9107 moves along the straight guide channel 9204 under the action of driving force and comes into contact with the angled structure of the variable track plate 9205, it squeezes the variable track plate 9205 to overcome the elastic force of the return spring 9208 and rotates around the arc-shaped pin 9207, thus preventing the variable track plate 9205 from obstructing the movement of the locking pin 9107. When the driving force disappears, the return spring 9208 pushes the return plate 9206 again to drive the variable track plate 9205 to rotate and reset, and presses against the inner wall of the straight guide channel 9204 again. When the locking pin 9107 moves back along the straight guide channel 9204 under the action of driving force, it presses against the other side of the angled structure of the variable track plate 9205. At this time, the angled structure presses against the inner wall of the straight guide channel 9204 and cannot rotate, forcing the locking pin 9107 to enter the inclined guide channel 9203, thus switching the state of the movable plate 9102.

[0035] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A method for preparing a high-strength wear-resistant sprocket, characterized in that, Includes the following steps: S1. Billet preparation: Alloy structural steel is selected as the raw material. The alloy structural steel is prepared from the following components by weight percentage: carbon 0.35-0.50%, silicon 0.20-0.40%, chromium 1.80-3.50%, nickel 1.4-1.9%, molybdenum 0.35-1.80%, vanadium 0.10-0.40%, niobium 0.02-0.06%, aluminum 0.02-0.06%, rhenium 0.01-0.02%, manganese 0.50-0.80%, phosphorus ≤0.025%, sulfur ≤0.015%, with the balance being iron powder and unavoidable impurities. S2. Forging process: The raw material heated to a plastic state is forged into a sprocket body (1) blank and a keel plate (2) blank by forging equipment. After forging, it is cooled to room temperature by air cooling. S3. Rough machining: After the billet cools, the outline is first machined by turning on a lathe and milling on a milling machine, and then the oxide scale on the surface of the billet is removed by pickling. S4. Heat treatment: The rough-machined billet is placed in a heat treatment furnace and subjected to normalizing and tempering treatments in sequence. S5. Finishing: Perform precision turning and precision milling operations on the heat-treated billet in sequence. S6. Surface treatment: The sprocket body (1) and keel disc (2) after precision machining are subjected to surface strengthening treatment by carburizing and quenching process respectively. S7. Post-processing: Tempering is performed on the surface-treated sprocket body (1) and keel plate (2), followed by grinding operation by a grinding device to remove burrs from the surface of the sprocket body (1) and keel plate (2), and then cleaning is performed. Finally, the finished sprocket is obtained after passing the inspection. The grinding device includes an operating table (3), and a two-way screw mechanism (4) and a fixing frame (5) are installed on the top of the operating table (3). The bidirectional screw mechanism (4) has a first rotating mechanism (6) installed on one moving end and a second rotating mechanism (7) installed on the other moving end, and the fixed frame (5) is arranged between the first rotating mechanism (6) and the second rotating mechanism (7); The first rotating mechanism (6) includes a rotating frame (601), and the keel plate (2) is detachably inserted into the rotating frame (601); the second rotating mechanism (7) includes a rotating shaft (701), and the sprocket body (1) is detachably inserted into the rotating shaft (701); The top of the fixed frame (5) is rotatably connected to a grinding frame (8), and an adjustment and locking assembly (9) is arranged in the inner cavity of the fixed frame (5); a first grinding assembly (81) is arranged on one side wall of the grinding frame (8), and a second grinding assembly (82) is arranged on the other side wall; the adjustment and locking assembly (9) is used to drive the grinding frame (8) to rotate 180°, and lock the grinding frame (8) in the target position after rotating to the correct position; The adjustment and locking component (9) is used to control the grinding frame (8) to rotate 180° and form a locked state. When the grinding frame (8) is in the initial working position, the first grinding component (81) can grind the inner and outer circumferential walls of the keel plate (2), and the second grinding component (82) can grind the inner wall of the weight reduction groove (101) of the sprocket body (1). When the grinding frame (8) rotates 180°, the first grinding component (81) can grind the side wall of the sprocket body (1), and the second grinding component (82) can grind the side wall of the keel plate (2).

2. The method for preparing a high-strength wear-resistant sprocket according to claim 1, characterized in that, The first rotating mechanism (6) further includes a base (602) installed on the top of the moving end of the bidirectional screw mechanism (4). A plurality of slide rods (603) are installed on the top of the base (602). A frame (604) is slidably arranged on the slide rods (603). A spring (605) is also sleeved on the slide rods (603). One end of the spring (605) abuts against the base (602) and the other end abuts against the frame (604). The top of the frame (604) is equipped with a first motor (606), the output end of the first motor (606) is connected to the rotating frame (601), the rotating frame (601) includes multiple support rods (6011), the end of the support rod (6011) is connected to a plug rod (6012), the plug rod (6012) can form a plug-in engagement with the connection hole (202) of the keel plate (2), and a magnetic block (6013) is installed on the outer circumference of the plug rod (6012), the magnetic block (6013) is used to attract the keel plate (2).

3. The method for preparing a high-strength wear-resistant sprocket according to claim 2, characterized in that, The second rotating mechanism (7) is equipped with the same motor drive structure as the first rotating mechanism (6). The motor output end of the second rotating mechanism (7) is connected to the rotating shaft (701). The rotating shaft (701) can form a plug-in fit with the keyway structure of the inner hole of the sprocket body (1).

4. The method for preparing a high-strength wear-resistant sprocket according to claim 3, characterized in that, The grinding frame (8) is equipped with a second motor (83) on top and has a gear transmission assembly inside. The first polishing assembly (81) includes a long cylindrical polishing head (8101) and a stacked cylindrical polishing head (8102). The sidewall of the long cylindrical polishing head (8101) is fitted with the outer circumferential wall of the keel plate (2), and the stacked cylindrical polishing head (8102) is fitted with the inner circumferential wall structure of the keel plate (2). The ends of the long cylindrical polishing head (8101) and the stacked cylindrical polishing head (8102) are arranged with a difference in length position. The second polishing assembly (82) includes a short cylindrical polishing head (8201) and a long stacked polishing head (8202). The short cylindrical polishing head (8201) is arranged to fit against the long diameter circular wall of the weight reduction groove (101), and the long stacked polishing head (8202) is arranged to fit against the short diameter circular wall of the weight reduction groove (101). When the sprocket body (1) rotates, the ends of the short cylindrical polishing head (8201) and the ends of the long stacked polishing head (8202) can form an intersection area in the movement trajectory of the weight reduction groove (101). The ends of the short cylindrical polishing head (8201) and the long stacked polishing head (8202) are arranged in a coplanar manner. The power output by the second motor (83) is transmitted through the gear transmission assembly, which can drive the grinding heads of the first grinding assembly (81) and the second grinding assembly (82) to perform synchronous rotational grinding actions.

5. The method for preparing a high-strength wear-resistant sprocket according to claim 4, characterized in that, The bottom of the grinding frame (8) is connected to a drive component (84). The drive component (84) moves through the top of the fixed frame (5) and extends into the inner cavity. The drive component (84) includes a drive column, and a drive cylinder (8401) is rotatably arranged on the outer circumference of the drive column.

6. The method for preparing a high-strength wear-resistant sprocket according to claim 5, characterized in that, The adjustment and locking assembly (9) includes an adjustment member (91) connected to the side wall of the base (602), and the adjustment member (91) is slidably arranged at the bottom of the inner cavity of the fixing frame (5); The adjusting component (91) includes a fixed plate (9101) and a movable plate (9102). The top of the fixed plate (9101) is provided with a plurality of straight grooves (9103) and movable grooves (9104). The movable grooves (9104) are arranged between two of the straight grooves (9103). The movable plate (9102) is slidably arranged in the movable groove (9104). The top of the movable plate (9102) is provided with a straight groove (9105) and a semi-circular groove (9106). The top of the movable plate (9102) is connected to a plurality of locking pins (9107). The two straight grooves (9103) can be connected through the semi-circular groove (9106). When the movable plate (9102) slides from one end to the other end in the movable groove (9104), the two straight grooves (9103) can be connected through the straight groove (9105). The drive cylinder (8401) is movably arranged within the straight groove (9103).

7. The method for preparing a high-strength wear-resistant sprocket according to claim 6, characterized in that, The adjustment and locking assembly (9) further includes a control lock (92) installed in the inner cavity of the fixing frame (5), the control lock (92) being arranged above the adjustment member (91); The control lock (92) includes a base plate (9201), and a plurality of guide plates (9202) are connected to the bottom of the base plate (9201). The two ends of the guide plates (9202) are set as inclined surface structures that are parallel to each other. An inclined guide channel (9203) is formed between every two guide plates (9202). The inclined surface structure at the end of the guide plate (9202) and the inner sidewall of the base plate (9201) form a structural channel with the same structure as the inclined guide channel (9203). A straight guide channel (9204) is formed between the guide plate (9202) and the other inner sidewall of the base plate (9201). There are multiple straight guide channels (9204). The locking pin (9107) is movably arranged within the straight guide channel (9204) and can enter another straight guide channel (9204) through the inclined guide channel (9203).

8. The method for preparing a high-strength wear-resistant sprocket according to claim 7, characterized in that, A variable track plate (9205) is rotatably arranged inside the guide plate (9202). One end of the variable track plate (9205) is connected to a reset plate (9206), and the other end of the variable track plate (9205) is set with an angled structure. An arc-shaped column (9207) is connected to the inner side wall of the guide plate (9202). A reset spring (9208) is sleeved on the arc-shaped column (9207). The reset plate (9206) is slidably arranged on the arc-shaped column (9207). One end of the reset spring (9208) is connected to the inner side wall of the guide plate (9202), and the other end is connected to the side wall of the reset plate (9206). The arc of the arc-shaped column (9207) and the rotation trajectory of the variable track plate (9205) are concentric circles. The reset spring (9208) can generate elastic force on the reset plate (9206) and drive the variable track plate (9205) to rotate and reset until the angled structure at one end of the variable track plate (9205) forms a pressing contact with the inner wall of the straight guide channel (9204), and the side wall of the variable track plate (9205) forms a linear alignment with the side wall of the inclined guide channel (9203).

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