CN113523927B

CN113523927B - Polishing device and method for polishing inner side hole wall of gear casting

Info

Publication number: CN113523927B
Application number: CN202110749810.7A
Authority: CN
Inventors: 丁祥; 叶强华; 朱国正
Original assignee: Taizhou Rich Power Machinery Co ltd
Current assignee: Taizhou Rich Power Machinery Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2023-06-30
Anticipated expiration: 2041-07-02
Also published as: CN113523927A

Abstract

The invention discloses a polishing device and a polishing method for polishing the inner side hole wall of a gear casting, which belong to the field of gear machining. The invention can finely adjust the position of the polishing mechanism according to the position of the gear, so that the polishing mechanism is concentric with the inner hole of the gear, the abrasion of the tooth surface of the bottom gear caused by pushing the gear to clamp is avoided, the damage of the gear is avoided, and the cost is saved. The invention can automatically measure the inner diameters of gears with different sizes, automatically adjust the positions of the grinding wheels, avoid manual adjustment and improve the production efficiency; according to the invention, the air injection unit can be automatically adjusted, so that the air injection unit is always aligned to the polishing position, the polishing quality of subsequent polishing is prevented from being influenced by the adhesion of polishing scraps on the polishing grinding wheel, and the polishing effect is improved.

Description

Polishing device and method for polishing inner side hole wall of gear casting

Technical Field

The invention belongs to the field of gear machining, and particularly relates to a polishing device and a polishing method for polishing the inner side hole wall of a gear casting.

Background

The gear means a mechanical element on the rim, which is continuously engaged with the gear to transmit motion and power. Gears are widely used in mechanical transmissions. During machining, in order to enable the inner side hole wall of the gear to meet the roughness requirement or the aperture requirement of assembly, a grinding machine is required to be used for fine adjustment grinding. In order to improve production efficiency, when polishing the inner hole of the gear, the inner hole of the gear is often stacked into a long cylindrical shape for batch processing and polishing. The clamping centering is needed before batch polishing, the existing clamping centering mode is to push the gears to the center by adopting the clamping piece to perform four-side clamping centering, but because the cast iron gears are large in mass, the mass after stacking is greatly increased, the tooth surfaces of the gears at the bottom end are worn when the gears are pushed, and parts are damaged; in addition, the inner diameter of the gear is not necessarily required, the polishing mechanism is required to be adjusted every time when gears with different sizes are processed, time and labor are wasted, and the processing efficiency is reduced; the polishing scraps generated by polishing are attached to a polishing grinding wheel, so that the polishing quality of subsequent polishing can be affected.

Therefore, it is necessary to provide a polishing device and a method for polishing the inner side hole wall of a gear casting, the device can finely adjust the position of a polishing mechanism according to the position of a gear, so that the polishing mechanism is concentric with an inner hole of the gear, the abrasion of the tooth surface of the gear at the bottom end caused by pushing the gear to clamp is avoided, the damage of the gear is avoided, and the cost is saved; in addition, this device not only can the internal diameter of not unidimensional gear of automatic measure, and automatic adjustment grinds the emery wheel position, avoids manual adjustment, uses manpower sparingly, improves production efficiency, and this device can also be according to measuring stroke automatic adjustment jet unit, makes the jet unit aim at the position of polishing all the time, avoids polishing the piece and adheres to the quality of polishing that can influence follow-up polishing on polishing the emery wheel, improves the effect of polishing.

Disclosure of Invention

The invention aims to provide a polishing device and a polishing method for polishing the inner side hole wall of a gear casting, which are used for solving the problems of the prior art in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the polishing device comprises a workbench for placing gears, wherein the gears are stacked to be columnar, a first through hole is formed in the workbench, a clamping centering mechanism which is concentrically arranged with the first through hole and a polishing mechanism which stretches into the inner hole wall of the gears to polish are arranged on the workbench, the polishing mechanism is arranged on the clamping centering mechanism and comprises a screw sleeve and a screw rod, the screw rod is slidably arranged on the screw sleeve, and a polishing unit which automatically adapts to the inner diameters of gears of different sizes and an air injection unit for removing polishing fragments are arranged at the upper end of the screw rod; the clamping centering mechanism comprises a fixing unit for clamping the gear and a centering adjusting unit, wherein the centering adjusting unit is used for adjusting the position of the polishing unit to enable the polishing unit to be concentric with the inner hole of the gear.

As a further scheme of the invention, the fixing unit comprises a clamping plate and a compression block which are slidably arranged on the workbench, the clamping plate is slidably arranged on the table top of the workbench along the radial direction of the gear, and a first compression spring is arranged between the clamping block and the workbench; the compressing block is vertically and slidably arranged on a sliding column arranged on the workbench.

As a further scheme of the invention, the centering adjustment unit comprises a correction block for adjusting the position of the screw sleeve to enable the screw sleeve to be concentric with the inner hole of the gear, the bottom end of the clamping plate is hinged with the correction block through a first connecting rod, the correction block and the screw sleeve are both slidably installed in a correction bin arranged at the bottom of the workbench, and an elastic part is arranged on one side, close to the screw sleeve, of the correction block.

As a further scheme of the invention, the polishing unit comprises a mounting seat provided with a polishing grinding wheel and a telescopic assembly for measuring the size of an inner hole of the gear, and the mounting seat is detachably arranged on the telescopic assembly; the telescopic component comprises a first sliding plate vertically and slidably arranged on the screw rod along the axial length direction of the screw rod, and also comprises a second sliding plate horizontally and slidably arranged on the screw rod along the radial direction of the screw rod, wherein the second sliding plates are respectively arranged at two sides of the first sliding plate, the first sliding plate is hinged with the second sliding plate through a second connecting rod, and mounting seats are detachably arranged on the second sliding plates at two sides of the first sliding plate; the upper end of the first sliding plate is fixedly provided with a driving rod, and the lower end of the first sliding plate is connected with a screw rod through a second compression spring; the lower extreme fixed mounting of first sliding plate has first rack, still slidable mounting has the retaining member on the screw rod, the slip direction of retaining member is unanimous with the second sliding plate, and the retaining member passes through third compression spring with the screw rod and links to each other, and the retaining member is close to the one end of first rack and is equipped with pawl portion and is used for locking first rack.

As a further scheme of the invention, the screw is also vertically and slidably provided with the unlocking piece, the sliding direction of the unlocking piece is consistent with the direction of the first sliding plate, and the upper end of the unlocking piece is provided with a wedge surface for driving the locking piece to unlock.

As a further scheme of the invention, the polishing precision of the polishing grinding wheels arranged on the mounting seats at two sides is different.

As a further scheme of the invention, the air injection unit comprises an air nozzle connected with an air source and an adjusting component for adjusting the orientation of the air nozzle; the adjusting component comprises a first rotating shaft which is rotatably arranged on the screw rod, an air nozzle is fixedly arranged on the first rotating shaft, and the length direction of the first rotating shaft is perpendicular to the axial length direction of the screw rod; the first rotating shaft is fixedly provided with a first gear, two sides of the driving rod are provided with second racks, and the first gear is meshed with the second racks.

The invention also provides a method for polishing the inner side hole wall of the gear casting, which mainly comprises the following steps:

s1: pulling the clamping plate open, and placing the columnar gear on the workbench to enable the gear to be positioned right above the first through hole;

s2: the pressing block downwards presses the gear, the clamping plate clamps the gear, and meanwhile, the screw sleeve is driven to adjust the position of the polishing mechanism, so that the polishing unit and the inner hole of the gear are concentric;

s3: the polishing unit stretches into the gear to automatically measure the inner diameter of the gear, polishing is started, and meanwhile, the air injection unit injects air to remove polishing scraps.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the position of the polishing mechanism can be finely adjusted according to the position of the gear, the actual size of the gear is measured through clamping the gear by the clamping plate, and the correction blocks are driven to move by the clamping plate, so that the correction blocks in four directions can be circumferentially distributed by taking the axis of the gear as the center of a circle, and thus, the correction block adjusting screw sleeve is concentric with the inner hole of the gear to be processed, the subsequent polishing is convenient, and the polishing effect is ensured. This setting has avoided the bottom gear tooth face wearing and tearing because of promoting the gear clamp to lead to the fact, avoids the gear damage, simple structure practices thrift the cost.

2. The invention can be suitable for the inner diameters of gears with different sizes, can automatically measure the inner diameters of gears with different sizes during processing, automatically adjust the position of the grinding wheel, avoid manual adjustment, save manpower and improve the production efficiency. In addition, when the gear is not clamped and the correction block does not adjust the threaded sleeve, the threaded rod cannot move upwards to enter the inner hole of the gear even if the threaded rod rotates. Because the screw sleeve is not clamped and fixed at this time, the screw rod rotates to drive the screw sleeve to rotate together. Therefore, the gear can be prevented from being machined under the condition of unfixed, the fool-proof design is avoided, machining errors are avoided, scrapping is generated, and production cost is increased. .

3. According to the invention, the air injection unit can be automatically adjusted according to the measuring stroke, so that the air injection unit is always aligned to the polishing position, the phenomenon that polishing scraps adhere to a polishing grinding wheel to influence the polishing quality of subsequent polishing is avoided, and the polishing effect is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a gear casting inside hole wall grinding device;

FIG. 2 is a cross-sectional view of FIG. 1 of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view of the structure of the workbench of the invention;

FIG. 5 is a schematic view of the removal table and gears of FIG. 1 in accordance with the present invention;

fig. 6 is a cross-sectional view of another view of the body 1 of the present invention;

FIG. 7 is an enlarged view of a portion B of FIG. 6 in accordance with the present invention;

fig. 8 is a process flow diagram of a method for polishing the inner side hole wall of a gear casting.

In the drawings, the list of components represented by the various numbers is as follows:

1-workbench, 2-first through hole, 3-fixed unit, 31-clamping plate, 32-compressing block, 33-first compression spring, 34-sliding column, 4-threaded sleeve, 5-threaded rod, 6-centering adjustment unit, 61-correcting block, 62-first connecting rod, 63-correcting bin, 64-elastic part, 7-grinding unit, 71-mounting seat, 72-telescopic component, 721-first sliding plate, 722-second sliding plate, 723-second connecting rod, 724-driving rod, 725-second compression spring, 726-first rack, 727-locking piece, 728-third compression spring, 729-pawl part, 73-unlocking piece, 74-wedge surface, 8-air injection unit, 81-air injection nozzle, 82-first rotating shaft, 83-first gear and 84-second rack.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, a polishing device for polishing the inner side hole wall of a gear casting comprises a workbench 1 for placing gears, wherein the gears are stacked to be columnar, a first through hole 2 is formed in the workbench 1, a clamping centering mechanism which is concentrically arranged with the first through hole 2 and a polishing mechanism which stretches into the inner side hole wall of the gear for polishing through the first through hole 2 are arranged on the workbench 1, the polishing mechanism is arranged on the clamping centering mechanism and comprises a threaded sleeve 4 and a threaded rod 5, the threaded rod 5 is slidably arranged on the threaded sleeve 4, and a polishing unit 7 which is automatically adapted to the inner diameters of gears with different sizes and an air injection unit 8 for removing polishing fragments are arranged at the upper end of the threaded rod 5; the clamping centering mechanism comprises a fixing unit 3 for clamping the gear and a centering adjustment unit 6, wherein the centering adjustment unit 6 is used for adjusting the position of the polishing unit 7 so that the polishing unit 7 is concentric with the inner hole of the gear.

In order to improve production efficiency, when polishing the inner hole of the gear, the inner hole of the gear is often stacked into a long cylindrical shape for batch processing and polishing. The clamping centering is needed before batch polishing, the existing clamping centering mode is to push the gears to the center by adopting the clamping piece to perform four-side clamping centering, but because the cast iron gears are large in mass, the mass after stacking is greatly increased, the tooth surfaces of the gears at the bottom end are worn when the gears are pushed, and parts are damaged; in addition, the inner diameter of the gear is not necessarily required, the polishing mechanism is required to be adjusted every time when gears with different sizes are processed, time and labor are wasted, and the processing efficiency is reduced; the polishing scraps generated by polishing are attached to a polishing grinding wheel, so that the polishing quality of subsequent polishing can be affected. As shown in fig. 1, 4 and 5, in the working process of the invention, the stacked gears are placed at the center of the first through hole 2 on the workbench 1, and because the gears are not precisely positioned, the positions of the gears are only approximately positioned at the center of the workbench 1, so that the gears are prevented from moving on the workbench 1 to generate abrasion, and the positions of the polishing units 7 need to be adjusted to ensure that the polishing units 7 and the inner holes of the gears are concentric for facilitating subsequent polishing. According to the invention, after the gear is placed on the workbench 1, the fixing unit 3 clamps the gear, and meanwhile, the polishing unit 7 is fixedly adjusted to enable the polishing unit 7 arranged on the screw 5 to be concentric with the inner hole of the gear through adjusting the positions of the screw sleeve 4 and the screw 5, so that subsequent polishing is facilitated. The invention can finely adjust the position of the polishing mechanism according to the position of the gear, so that the polishing mechanism is concentric with the inner hole of the gear to be processed, the abrasion of the tooth surface of the bottom gear caused by pushing the gear to clamp is avoided, the damage of the gear is avoided, and the cost is saved; in addition, the invention not only can automatically measure the inner diameters of gears with different sizes and automatically adjust the positions of the grinding wheels, avoid manual adjustment, save labor and improve the production efficiency, but also can automatically adjust the air injection unit 8 according to the measuring stroke, so that the air injection unit 8 always aims at the grinding positions, thereby avoiding the influence of grinding scraps attached to the grinding wheels on the grinding quality of subsequent grinding and improving the grinding effect.

As a further scheme of the invention, the fixing unit 3 comprises a clamping plate 31 and a compression block 32 which are slidably mounted on the workbench 1, wherein the clamping plate 31 is slidably mounted on the surface of the workbench 1 along the radial direction of the gear, and a first compression spring 33 is arranged between the clamping block and the workbench 1; the pressing block 32 is vertically slidably mounted on a sliding column 34 provided on the table 1.

The fixing unit 3 of the present invention clamps the cylindrical stacked gears placed on the table 1, and as shown in fig. 1, the clamping plate 31 of the present invention is pulled apart before the gears are placed, compressing the first compression spring 33; then, the gear is placed, the clamping plate 31 clamps the gear under the restoring force of the first compression spring 33, and the compression block 32 sliding on the sliding column 34 moves downwards to compress under the drive of the external driving source, so that the gear is fixed. The device has the advantages of simple structure, convenient use and high production efficiency.

As a further scheme of the invention, the centering adjustment unit 6 comprises a correction block 61 for adjusting the position of the screw sleeve 4 to enable the screw sleeve 4 to be concentric with the inner hole of the gear, the bottom end of the clamping plate 31 is hinged with the correction block 61 through a first connecting rod 62, the correction block 61 and the screw sleeve 4 are both slidably installed in a correction bin 63 arranged at the bottom of the workbench 1, and an elastic part 64 is arranged on one side of the correction block 61 close to the screw sleeve 4.

According to the invention, after the gear is fixed, the position of the polishing mechanism is required to be adjusted according to the position of the gear, so that the polishing unit 7 can be concentric with the inner hole of the gear, subsequent polishing is convenient, and the polishing effect is ensured. As shown in fig. 1, 2 and 3, when the fixing unit 3 fixes the gear, the clamping plate 31 drives the correction block 61 to slide in the correction chamber 63 through the first link 62 at the bottom end, the elastic portion 64 on the correction block 61 presses the screw sleeve 4, and the screw sleeve 4 is adjusted to a new position to fix the screw sleeve under the pressing of the four-sided correction block 61. Since the moving distance of the clamping plate 31 for driving the correcting block 61 to move is determined by the external dimension of the gear, the correcting blocks 61 in four directions are circumferentially arranged around the axis of the gear as the center of the circle, and the new position of the screw sleeve 4 to which the position is adjusted by the correcting block 61 is concentric with the inner hole of the gear. According to the invention, the position of the polishing mechanism can be finely adjusted according to the position of the gear, the actual size of the gear is measured through clamping the gear by the clamping plate 31, and the correction blocks 61 are driven to move by the clamping plate 31, so that the correction blocks 61 in four directions can be circumferentially distributed by taking the axle center of the gear as the circle center, and thus the correction blocks 61 adjust the concentricity of the screw sleeve 4 and the inner hole of the gear to be processed, the subsequent polishing is convenient, and the polishing effect is ensured. This setting has avoided the bottom gear tooth face wearing and tearing because of promoting the gear clamp to lead to the fact, avoids the gear damage, simple structure practices thrift the cost.

As a further scheme of the invention, the polishing unit 7 comprises a mounting seat 71 provided with a polishing grinding wheel and a telescopic assembly 72 for measuring the size of an inner hole of the gear, and the mounting seat 71 is detachably arranged on the telescopic assembly 72; the telescopic assembly 72 comprises a first sliding plate 721 vertically and slidably mounted on the screw 5 along the axial length direction of the screw 5, and further comprises a second sliding plate 722 horizontally and slidably mounted on the screw 5 along the radial direction of the screw 5, the second sliding plates 722 are respectively arranged at two sides of the first sliding plate 721, the first sliding plate 721 is hinged with the second sliding plate through a second connecting rod 723, and the second sliding plates 722 at two sides of the first sliding plate 721 are detachably provided with mounting seats 71; the upper end of the first sliding plate 721 is fixedly provided with a driving rod 724, and the lower end is connected with the screw 5 through a second compression spring 725; the lower end of the first sliding plate 721 is fixedly provided with a first rack 726, the screw 5 is also provided with a locking piece 727 in a sliding mode, the sliding direction of the locking piece 727 is consistent with that of the second sliding plate 722, the locking piece 727 is connected with the screw 5 through a third compression spring 728, and one end, close to the first rack 726, of the locking piece 727 is provided with a pawl portion 729 used for locking the first rack 726.

As a further scheme of the invention, an unlocking piece 73 is further vertically arranged on the screw 5 in a sliding mode, the sliding direction of the unlocking piece 73 is consistent with that of the first sliding plate 721, and a wedge surface 74 for driving the locking piece 727 to unlock is arranged at the upper end of the unlocking piece 73.

4. Because the inside diameter of each batch of processing gears is not necessarily, the grinding mechanism needs to be adjusted every time gears with different sizes are processed, time and labor are wasted, the labor intensity of workers is increased, and the processing efficiency is reduced. So, as shown in fig. 3, after centering the gear, the driving screw 5 is rotated in the forward direction, and the screw 5 is spirally lifted into the gear inner hole because the screw sleeve 4 is clamped by the correction block 61. As shown in fig. 5, 6 and 7, when the screw 5 is raised to the top of the cylindrical stacking gear, the grinding unit 7 on the screw 5 is brought into contact with the pressing block 32, and the telescopic assembly 72 automatically stretches the inside diameter of the measuring gear. The specific process is as follows: as shown in fig. 7, the driving rod 724 of the telescopic assembly 72 is in contact with the pressing block 32 above, the pressing block 32 drives the driving rod 724 to move downwards, the first sliding plate 721 fixedly connected with the driving rod 724 moves downwards, and the first sliding plate 721 drives the second sliding plate 722 to extend radially through the second connecting rod 723, so that the size of the inner hole of the gear is measured. As the first slide plate 721 moves downward, the first rack 726 fixedly installed under the first slide plate 721 also moves downward, and the second compression spring 725 is compressed, at which time the pawl portion 729 of the locker 727 does not restrict the downward displacement of the first rack 726. The second sliding plate 722 is detachably provided with the mounting seat 71, when the polishing grinding wheel on the mounting seat 71 is attached to the inner side hole wall of the gear, the second sliding plate 722 cannot move, so that the inner diameter of the gear is measured, the position of the polishing grinding wheel is adjusted, at the moment, the screw 5 stops rotating forwards and starts reversing, the screw 5 spirals downwards, and the polishing grinding wheel on the mounting seat 71 polishes the inner side hole wall of the gear. At this time, the driving rod 724 loses the downward driving of the pressing block 32, the first slide plate 721 is biased to move upward by the restoring force of the second compression spring 725, and when the pawl portion 729 of the locker 727 is caught by the first rack 726, the upward displacement of the first rack 726 is restricted, the first slide plate 721 is locked, and the mount 71 is locked. When the gear inner hole is polished, the upper end of the screw 5 moves downwards to the position of the screw sleeve 4, the unlocking piece 73 can be jacked up by the screw sleeve 4, the wedge surface 74 drives the locking piece 727 to move to the radial outer side of the screw 5, the first rack 726 is unlocked, and the first sliding plate 721 returns to the original position under the restoring force of the second compression spring 725 and repeats circularly. The invention can be suitable for the inner diameters of gears with different sizes, can automatically measure the inner diameters of gears with different sizes during processing, automatically adjust the position of the grinding wheel, avoid manual adjustment, save manpower and improve the production efficiency. In addition, when the gear is not clamped and the correction block 61 does not adjust the threaded sleeve 4, the threaded rod 5 does not move upwards into the inner hole of the gear even if the threaded rod 5 rotates. Because the screw sleeve 4 is not clamped and fixed at this time, the screw 5 rotates to drive the screw sleeve 4 to rotate together. Therefore, the gear can be prevented from being machined under the condition of unfixed, the fool-proof design is avoided, machining errors are avoided, scrapping is generated, and production cost is increased.

As a further aspect of the present invention, the grinding precision of the grinding wheels mounted on the mounting seats 71 on both sides is different. The single grinding may not be fine, and the grinding wheel with different grinding precision is set for grinding, and the grinding wheel is fine ground after coarse grinding, so that the grinding effect can be improved.

The size of the compaction block of the present invention is larger than the inner diameter of the gear but smaller than the outer diameter of the gear.

As a further scheme of the invention, the air injection unit 8 comprises an air nozzle 81 connected with an air source and an adjusting component for adjusting the orientation of the air nozzle 81; the adjusting assembly comprises a first rotating shaft 82 rotatably arranged on the screw 5, an air nozzle 81 is fixedly arranged on the first rotating shaft 82, and the length direction of the first rotating shaft 82 is perpendicular to the axial length direction of the screw 5; a first gear 83 is fixedly mounted on the first rotating shaft 82, second racks 84 are arranged on two sides of the driving rod 724, and the first gear 83 is meshed with the second racks 84.

The polishing scraps generated during polishing can be attached to the polishing grinding wheel to influence the polishing quality of subsequent polishing, so that the polishing scraps are required to be removed during polishing. Because the internal diameters of the gears polished by the invention are different in size, the orientation of the air injection unit 8 also needs to be adjusted in real time according to the internal diameters of the gears. As shown in fig. 7, when the telescopic assembly 72 is used for adjusting the position of the mounting seat 71, the driving rod 724 moves downwards, the second rack 84 arranged on the driving rod 724 moves downwards to drive the first gear 83 to rotate, the first gear 83 is fixedly arranged on the first rotating shaft 82, the first rotating shaft 82 rotates, the air nozzle 81 fixed on the first rotating shaft 82 also rotates and always aligns with the polishing grinding wheel on the mounting seat 71, and the polishing grinding wheel is blown to remove polishing fragments during polishing. According to the invention, the air injection unit 8 can be automatically adjusted according to the measuring stroke, so that the air injection unit 8 is always aligned to the polishing position, the phenomenon that polishing scraps adhere to a polishing grinding wheel to influence the polishing quality of subsequent polishing is avoided, and the polishing effect is improved.

s1: pulling the clamping plate 31 open, and placing the columnar gear on the workbench 1 so that the gear is positioned right above the first through hole 2;

s2: the pressing block 32 presses down the gear, the clamping plate 31 clamps the gear, and the driving screw sleeve 4 adjusts the position of the polishing mechanism, so that the polishing unit 7 is concentric with the inner hole of the gear;

s3: the polishing unit 7 stretches into the gear to automatically measure the inner diameter of the gear, polishing is started, and meanwhile, the air injection unit 8 injects air to remove polishing scraps.

Claims

1. A grinding device for polishing of gear casting inboard pore wall, its characterized in that: the gear grinding machine comprises a workbench (1) for placing gears, the gears are stacked to be columnar, a first through hole (2) is formed in the workbench (1), a clamping centering mechanism which is concentric with the first through hole (2) and a grinding mechanism which stretches into the inner hole wall of the gear to grind through the first through hole (2) are arranged on the workbench (1), the grinding mechanism is arranged on the clamping centering mechanism and comprises a screw sleeve (4) and a screw rod (5), the screw rod (5) is slidably arranged on the screw sleeve (4), and a grinding unit (7) which is automatically suitable for the inner diameters of gears of different sizes and an air injection unit (8) which is used for removing grinding fragments are arranged at the upper end of the screw rod (5); the clamping centering mechanism comprises a fixing unit (3) for clamping the gear and a centering adjustment unit (6), wherein the centering adjustment unit (6) is used for adjusting the position of the polishing unit (7) so that the polishing unit (7) is concentric with the inner hole of the gear;

the fixing unit (3) comprises a clamping plate (31) and a compression block (32) which are slidably arranged on the workbench (1), the clamping plate (31) is slidably arranged on the table top of the workbench (1) along the radial direction of the gear, and a first compression spring (33) is arranged between the clamping block and the workbench (1); the compaction block (32) is vertically and slidably arranged on a sliding column (34) arranged on the workbench (1);

the centering adjustment unit (6) comprises a correction block (61) for adjusting the position of the screw sleeve (4) to enable the screw sleeve (4) to be concentric with the inner hole of the gear, the bottom end of the clamping plate (31) is hinged with the correction block (61) through a first connecting rod (62), the correction block (61) and the screw sleeve (4) are both slidably installed in a correction bin (63) arranged at the bottom of the workbench (1), and an elastic part (64) is arranged on one side, close to the screw sleeve (4), of the correction block (61);

the polishing unit (7) comprises a mounting seat (71) provided with a polishing grinding wheel and a telescopic assembly (72) for measuring the size of an inner hole of the gear, and the mounting seat (71) is detachably arranged on the telescopic assembly (72); the telescopic assembly (72) comprises a first sliding plate (721) vertically and slidably arranged on the screw (5) along the axial length direction of the screw (5), and also comprises a second sliding plate (722) horizontally and slidably arranged on the screw (5) along the radial direction of the screw (5), the second sliding plates (722) are respectively arranged at two sides of the first sliding plate (721), the first sliding plate (721) is slidably hinged with the second through a second connecting rod (723), and mounting seats (71) are detachably arranged on the second sliding plates (722) at two sides of the first sliding plate (721); the upper end of the first sliding plate (721) is fixedly provided with a driving rod (724), and the lower end of the first sliding plate is connected with a screw rod (5) through a second compression spring (725); the lower extreme fixed mounting of first sliding plate (721) has first rack (726), and still slidable mounting has retaining member (727) on screw rod (5), the slip direction of retaining member (727) is unanimous with second sliding plate (722), and retaining member (727) link to each other through third compression spring (728) with screw rod (5), and one end that retaining member (727) is close to first rack (726) is equipped with pawl portion (729) and is used for locking first rack (726).

2. A grinding device for grinding the inner side hole wall of a gear casting according to claim 1, wherein: the screw rod (5) is further vertically and slidably provided with an unlocking piece (73), the sliding direction of the unlocking piece (73) is consistent with the direction of the first sliding plate (721), and the upper end of the unlocking piece (73) is provided with a wedge surface (74) for driving the locking piece (727) to unlock.

3. A grinding device for grinding the inner side hole wall of a gear casting according to claim 2, wherein: the polishing precision of the polishing grinding wheels arranged on the mounting seats (71) on the two sides is different.

4. A grinding device for grinding the inner side hole wall of a gear casting according to claim 3, wherein: the air injection unit (8) comprises an air nozzle (81) connected with an air source and an adjusting assembly for adjusting the orientation of the air nozzle (81); the adjusting assembly comprises a first rotating shaft (82) rotatably arranged on the screw (5), an air nozzle (81) is fixedly arranged on the first rotating shaft (82), and the length direction of the first rotating shaft (82) is perpendicular to the axial length direction of the screw (5); a first gear (83) is fixedly arranged on the first rotating shaft (82), second racks (84) are arranged on two sides of the driving rod (724), and the first gear (83) is meshed with the second racks (84).

5. A method for polishing the inner side hole wall of a gear casting, which is applicable to the polishing device as claimed in any one of claims 1 to 4, and is characterized in that: the polishing method mainly comprises the following steps:

s1: pulling the clamping plate (31) open, and placing the columnar gear on the workbench (1) so that the gear is positioned right above the first through hole (2);

s2: the pressing block (32) presses the gear downwards, the clamping plate (31) clamps the gear, and the screw sleeve (4) is driven to adjust the position of the polishing mechanism, so that the polishing unit (7) is concentric with the inner hole of the gear;

s3: the polishing unit (7) stretches into the gear to automatically measure the inner diameter of the gear, polishing is started, and meanwhile, the air injection unit (8) injects air to remove polishing scraps.