Precise grinding equipment for cast steel sleeve

Abstract

The invention relates to the technical field of sleeve grinding, and discloses cast steel sleeve precise grinding equipment which comprises a grinding wheel grinding mechanism, a chuck is installed below the grinding wheel grinding mechanism, a plurality of clamping jaws are installed in the chuck, and the tops of the clamping jaws do not exceed the upper surface of the chuck. An outer clamping jaw away from the circle center of the chuck and an inner supporting jaw close to the circle center of the chuck are installed on the surfaces of the clamping jaws correspondingly, a transmission range extending piece capable of enabling the outer clamping jaw and the inner supporting jaw to do range extending motion is installed on the surface of each clamping jaw, and rack limiting pieces used for limiting the outer clamping jaw and the inner supporting jaw to do one-way range extending motion are installed on the inner wall of the chuck. Through the design of the outer clamping jaw and the inner supporting jaw, compatibility of outer wall polishing and inner wall polishing in the same working procedure is achieved, compared with a traditional single inner supporting or outer clamping mode, the problem of polishing blind areas caused by clamp occupying is avoided, it is ensured that the inner wall and the outer wall of the cast steel sleeve can be completely machined at a time, two-time clamping is not needed, and the machining efficiency is improved. And the processing efficiency and the integrity are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sleeve grinding, and particularly to a precision grinding device for cast steel sleeves. Background Art

[0002] Cast steel sleeves are key components widely used in fields such as mechanical manufacturing, construction engineering, and energy equipment. They are mostly cylindrical structures. Because they are made of cast steel materials, they have high strength, high wear resistance, and good toughness, and can withstand large loads and complex stresses. In construction engineering, cast steel sleeves are often used for the steel bar connection of prefabricated buildings to ensure the stability of the structure; in the mechanical transmission system, it can be used as a bearing seat, connecting piece, etc. to ensure the reliability of equipment operation. Currently, cast steel sleeves are produced using intelligent manufacturing equipment, and there are the following problem points in this production process.

[0003] Due to the limitations of the casting process, there will be problems such as sand holes, burrs, and dimensional deviations on the surface of cast steel sleeves after production, which directly affect their assembly accuracy and service performance. Therefore, it is necessary to remove surface defects through grinding, improve surface finish, and ensure the accuracy of key dimensions such as inner diameter and outer diameter to meet the mating requirements with other components. The ground cast steel sleeves can not only reduce frictional losses, extend service life, but also enhance sealing performance and avoid leakage risks, which is of great significance for improving the safety and stability of the overall equipment.

[0004] However, there are still some problems with existing cast steel sleeve grinding equipment: During the grinding process of cast steel sleeves, maintaining their stability is the key prerequisite for ensuring processing accuracy. Existing technologies usually use a single inner support type or outer clamping type fixture for fixation. However, these two methods cannot work together in the same process. If the inner support type fixation is used, the fixture will occupy the internal space of the sleeve, making it difficult to grind the inner wall; if the outer clamping type fixation is used, it will block the outer wall of the sleeve and affect the outer wall grinding operation. This limitation makes it possible to only grind the inner wall or outer wall of the sleeve in a single grinding, and it is impossible to achieve a one-time complete processing of the inner and outer walls, which will further affect the low efficiency problem of intelligent manufacturing equipment when producing cast steel sleeves.

[0005] In addition, since both the inner and outer walls of cast steel sleeves need to be ground, under the requirements of precise and large-scale production, existing equipment needs to perform frequent loading and unloading operations to switch the grinding surface. This not only consumes a large amount of time, reduces production efficiency, but also easily introduces positioning errors due to multiple clamping, making it difficult to guarantee processing accuracy. In order to improve grinding efficiency and meet the large-scale production requirements, production enterprises often have to sacrifice a certain processing accuracy, simplify the clamping process or reduce the grinding process during grinding, resulting in the surface finish, dimensional accuracy, etc. of the ground sleeves being difficult to meet the strict requirements of high-end equipment manufacturing, restricting the application expansion of cast steel sleeves in high-end machinery and other fields.

[0006] To this end, the present invention proposes a precision grinding device for a cast steel sleeve. Summary of the Invention

[0007] The purpose of the present invention is to provide a precision grinding device for a cast steel sleeve to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: A precision grinding device for a cast steel sleeve, including a grinding wheel grinding mechanism. A chuck is installed below the grinding wheel grinding mechanism. A number of chucks are installed inside the chuck. The top of the chuck does not exceed the upper surface of the chuck. An outer clamping jaw away from the center of the chuck and an inner supporting jaw close to the center of the chuck are respectively installed on the surface of the chuck. A transmission and range-increasing member capable of enabling the outer clamping jaw and the inner supporting jaw to perform range-increasing movement is installed on the surface of each chuck. A rack limiting member for restricting the one-way range-increasing movement of the outer clamping jaw and the inner supporting jaw is installed on the inner wall of the chuck.

[0009] When performing inner wall grinding operation on the cast steel sleeve, drive the chuck to move. The transmission and range-increasing member and the rack limiting member work together to make the outer clamping jaw gradually approach and clamp the outer wall of the cast steel sleeve, providing positioning for the grinding process. At the same time, the inner supporting jaw realizes range-increasing movement under the action of the transmission and range-increasing member and contracts to the center of the inner wall of the cast steel sleeve, providing sufficient internal space for the grinding wheel grinding mechanism. On the contrary, when performing outer wall grinding on the cast steel sleeve, drive the chuck to move in the reverse direction. The outer clamping jaw realizes range-increasing outward expansion under the cooperation of the transmission and range-increasing member and the rack limiting member, making sufficient space for the outer wall grinding. The inner supporting jaw expands outward and supports the inner wall of the cast steel sleeve.

[0010] Preferably, the transmission and range-increasing members each include:

[0011] Two tooth columns, both of which are rotatably connected to both sides of the chuck;

[0012] Four fixed racks, and every two of the fixed racks are arranged at the bottom of the corresponding tooth column and fixedly connected to the surface of the chuck;

[0013] Four sliding racks, and two of the sliding racks are slidably connected to the top of the chuck, and their tops are respectively fixedly connected to the bottoms of the outer clamping jaw and the inner supporting jaw;

[0014] The tooth column, the fixed rack, and the sliding rack are all meshed with each other.

[0015] Preferably, the sliding rack and the fixed rack are both located on two lines tangent to the tooth column up and down, and the sliding rack is arranged close to the chuck, and the fixed rack is arranged away from the chuck; this position layout enables the fixed rack to provide a meshing basis for the tooth column when the chuck drives the tooth column to move, and the sliding rack drives the outer clamping jaw and the inner supporting jaw to perform range-increasing movement under the transmission of the tooth column.

[0016] Preferably, a number of limiting grooves are formed inside the chuck, and the rack limiting member includes:

[0017] A spring fixedly connected inside the limiting groove;

[0018] A vertical rack slidably connected inside the limiting groove and fixedly connected to the spring, and the vertical rack meshes with the tooth column.

[0019] Preferably, a sliding limiting member for maintaining the stable movement of the outer clamping jaw and the inner supporting jaw is installed inside the chuck, and the sliding limiting member includes:

[0020] A sliding groove formed on the side wall of the chuck;

[0021] A T-shaped rod fixedly connected to the surfaces of the outer clamping jaw and the inner supporting jaw respectively and slidably connected inside the sliding groove.

[0022] Preferably, every two of the T-shaped rods are fixedly connected to the outer clamping jaw and the inner supporting jaw respectively, and the vertical sections of their T-shaped structures are arranged away from each other;

[0023] The arrangement that the vertical sections of the T-shaped structures of the T-shaped rods are arranged away from each other can not only limit the movement direction thereof, ensure the stable movement of the outer clamping jaw and the inner supporting jaw along the established feeding direction path, but also provide compensation for the extra stroke space generated by the outer clamping jaw and the inner supporting jaw under the action of the transmission stroke increasing member.

[0024] Preferably, when the outer clamping jaw performs stroke increasing and expanding, and when the inner supporting jaw performs stroke increasing and contracting, the clearance distances formed between them and the surface of the cast steel sleeve are both greater than the maximum outer diameter of the grinding wheel in the grinding wheel grinding mechanism.

[0025] Preferably, the grinding wheel grinding mechanisms are provided in plural, and the number is at least two, and the chuck, the clamping jaws, the outer clamping jaw, the inner supporting jaw, the transmission stroke increasing member, the rack limiting member and the sliding limiting member are all correspondingly provided in plural;

[0026] The driving of the two chucks is opposite. When one chuck cooperates with the grinding wheel grinding mechanism to polish the inner wall of the cast steel sleeve, the other chuck cooperates with the corresponding grinding wheel grinding mechanism to polish the outer wall of the cast steel sleeve.

[0027] Preferably, after the cast steel sleeve finishes the polishing operation on the current surface, it is not necessary to remove the cast steel sleeve from the chuck. By directly driving the corresponding chuck, each component runs according to the operation steps opposite to the current ones, that is, the chuck that originally polished the inner wall is converted to drive the outer clamping jaw to perform stroke increasing and expanding, and the inner supporting jaw expands outwards to support the inner wall for outer wall polishing; the chuck that originally polished the outer wall is converted to drive the outer clamping jaw to clamp the outer wall, and the inner supporting jaw contracts to the center of the inner wall for inner wall polishing, realizing the independent work of multiple stations.

[0028] Preferably, both the chuck and the grinding wheel grinding mechanism are installed on the grinding machine tool, and the grinding machine tool provides a stable processing platform for the equipment.

[0029] Preferably, the chuck is driven by a built-in driving mechanism of the grinding machine tool. The driving mechanism is connected by a servo motor through a reducer to a lead screw transmission mechanism to achieve precise control of the rotation angle of the chuck. At the same time, the servo motor drives the jaws to move radially along the chuck through another set of independent lead screw nut pairs.

[0030] Preferably, the grinding wheel grinding mechanism is a multi-axis linkage grinding unit, including but not limited to: a vertical working spindle, a horizontal transverse axis, and a horizontal longitudinal axis;

[0031] Among them, the vertical working spindle is used to install the grinding wheel and realize the linear feed of the grinding wheel in the Z direction; the horizontal transverse axis and the longitudinal axis can realize the linear feed of the grinding wheel in the X and Y directions.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] Dual-functional clamping integration: Through the design of the outer clamping jaws and the inner supporting jaws, this equipment realizes the compatibility of grinding the outer wall and the inner wall in the same process. Compared with the traditional single inner support or outer clamping method, it avoids the problem of grinding blind spots caused by the occupation of the fixture, ensuring that the inner and outer walls of the cast steel sleeve can be processed completely at one time without two separate clampings, significantly improving the processing efficiency and integrity of the intelligent manufacturing equipment.

[0034] Increased-stroke motion for efficient space yielding: The unique structure of the transmission stroke-increasing part enables the jaws to generate differential displacements. When grinding the inner wall, the inner supporting jaws can quickly contract to yield space, and when grinding the outer wall, the outer clamping jaws expand synchronously, reducing the interference risk between the jaws and the grinding wheel. This design not only ensures sufficient grinding space but also shortens the jaw adjustment time, enabling the equipment to complete the grinding task more efficiently.

[0035] Unidirectional limit for precise control: The rack limiting part, through the cooperation with the vertical rack by a spring, realizes the unidirectional restriction of the movement of the jaws, preventing displacement deviation of the jaws due to uneven force during the stroke-increasing process. This design ensures the stability of the jaws during the grinding process, guarantees the positioning accuracy of the cast steel sleeve during fixation, and provides a reliable guarantee for precise grinding.

[0036] Dual-station parallel processing: Two sets of chucks and grinding wheel grinding mechanisms work together to simultaneously grind the inner and outer walls of two cast steel sleeves. Compared with traditional single-station equipment, the production efficiency is directly doubled, and there is no need for frequent loading and unloading, reducing the positioning error caused by multiple clampings and still maintaining high-precision processing in large-scale production.

[0037] The structure is stable and reliable: The sliding limit part adopts the combination of a T-shaped rod and a chute, providing stable guidance and restraint for the movement of the clamping jaws, enhancing the rigidity during the operation of the equipment. At the same time, this design can also provide space compensation for the extended movement of the clamping jaws, effectively reducing vibration and deviation, ensuring the long-term stable operation of the equipment and extending its service life. Brief Description of the Drawings

[0038] Figure 1 It is a front view three-dimensional schematic diagram of the grinding wheel grinding mechanism and the chuck of the present invention;

[0039] Figure 2 It is a side view three-dimensional schematic diagram of the main structure of the present invention and the grinding machine;

[0040] Figure 3 It is a front view schematic diagram of the main structure of the present invention and the grinding machine;

[0041] Figure 4 It is a three-dimensional schematic diagram of the main structure of the present invention;

[0042] Figure 5 It is a partial sectional three-dimensional schematic diagram of the main structure of the present invention;

[0043] Figure 6 For the present invention Figure 5 The enlarged three-dimensional schematic diagram of the structure at A in the figure;

[0044] Figure 7 It is a partial sectional three-dimensional schematic diagram of the main structure of the present invention from another angle;

[0045] Figure 8 It is a disassembled three-dimensional schematic diagram of the main structure of the present invention;

[0046] Figure 9 It is a movement schematic diagram of the outer clamping main structure of the present invention;

[0047] Figure 10 It is a movement schematic diagram of the inner support main structure of the present invention.

[0048] In the figure:

[0049] 11. Grinding wheel grinding mechanism; 12. Chuck; 121. Clamping jaw.

[0050] 21. Outer clamping jaw; 22. Inner support jaw; 23. Transmission range extender; 231. Tooth column; 232. Fixed rack; 233. Sliding rack; 24. Rack limit part; 241. Spring; 242. Vertical rack; 25. Sliding limit part; 251. Chute; 252. T-shaped rod. Detailed Description of the Invention

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that the grinding wheel grinding mechanism 11 only provides a grinding function for the sleeve, and the driving mechanism only provides the rotation of the chuck 12 and the feeding action of the jaws 121. The working principles and specific structures of the above structures are all prior arts. Therefore, due to the generality of the above structures, the specific principles will not be described in detail hereinafter.

[0053] Please refer to Figures 1 to 10 , the present invention provides an embodiment:

[0054] A precision grinding equipment for cast steel sleeves includes a grinding wheel grinding mechanism 11. Below the grinding wheel grinding mechanism 11, a chuck 12 is installed and mounted on the working table of the grinding equipment. Inside the chuck 12, a plurality of jaws 121 are installed, and the plurality of jaws 121 are arranged equidistantly in a ring around the chuck 12. The tops of the jaws 121 do not exceed the upper surface of the chuck 12. An outer clamping jaw 21 away from the center of the chuck 12 and an inner supporting jaw 22 close to the center of the chuck 12 are respectively installed on the surfaces of the jaws 121. A transmission range-increasing member 23 capable of enabling the outer clamping jaw 21 and the inner supporting jaw 22 to perform range-increasing movement is installed on the surface of each jaw 121. A rack limiting member 24 for restricting the one-way range-increasing movement of the outer clamping jaw 21 and the inner supporting jaw 22 is installed on the inner wall of the chuck 12;

[0055] When performing inner wall grinding operations on the cast steel sleeve, the jaws 121 are driven to move, and the transmission range-increasing member 23 and the rack limiting member 24 work together to gradually bring the outer clamping jaw 21 close to and clamp the outer wall of the cast steel sleeve, providing positioning for the grinding process. At the same time, the inner supporting jaw 22 realizes range-increasing movement under the action of the transmission range-increasing member 23 and contracts to the center of the inner wall of the cast steel sleeve, providing sufficient internal space for the grinding wheel grinding mechanism 11; On the contrary, when performing outer wall grinding on the cast steel sleeve, the jaws 121 are driven to move in the reverse direction. The outer clamping jaw 21 realizes range-increasing outward expansion under the cooperation of the transmission range-increasing member 23 and the rack limiting member 24, making sufficient space for the outer wall grinding. The inner supporting jaw 22 expands outward and supports the inner wall of the cast steel sleeve.

[0056] It should be noted that the transmission range extender 23 includes: two tooth columns 231, both of which are rotatably connected to both sides of the claw 121; four fixed racks 232, and every two fixed racks 232 are arranged at the bottom of the corresponding tooth column 231, and the fixed racks 232 are fixedly connected to the surface of the chuck 12; four sliding racks 233, and every two sliding racks 233 are slidably connected to the top of each claw 121, and the tops of every two sliding racks 233 are respectively fixedly connected to the bottoms of the outer clamping claw 21 and the inner supporting claw 22; the tooth column 231, the fixed rack 232 and the sliding rack 233 are all meshed with each other, and the sliding rack 233 and the fixed rack 232 are both located on two lines tangent to the tooth column 231 vertically, and the sliding rack 233 is arranged close to the claw 121, and the fixed rack 232 is arranged away from the claw 121; this position layout enables when the claw 121 drives the tooth column 231 to move, the fixed rack 232 provides a meshing basis for the tooth column 231, and the sliding rack 233 drives the outer clamping claw 21 and the inner supporting claw 22 to perform range extension movement under the drive of the tooth column 231. A number of limiting grooves are formed inside the chuck 12, and every four limiting grooves correspond to each driving claw 121. The rack limiting member 24 includes: a spring 241, and the spring 241 is fixedly connected to the inside of the limiting groove; a vertical rack 242, and the vertical rack 242 is slidably connected to the inside of the limiting groove, the vertical rack 242 is fixedly connected to the spring 241, and the vertical rack 242 is meshed with the tooth column 231. A sliding limiting member 25 for keeping the movement of the outer clamping claw 21 and the inner supporting claw 22 stable is installed inside the chuck 12. The sliding limiting member 25 includes: a sliding groove 251, and the sliding groove 251 is formed on the side wall of the chuck 12, and there are four groups of sliding grooves 251, and each group has two, and each group of sliding grooves 251 corresponds to each driving claw 121; a T-shaped rod 252, and the T-shaped rods 252 are respectively fixedly connected to the surfaces of the outer clamping claw 21 and the inner supporting claw 22, and the T-shaped rods 252 are slidably connected to the inside of the sliding groove 251, and every two T-shaped rods 252 are respectively fixedly connected to the outer clamping claw 21 and the inner supporting claw 22, and the vertical sections of the T-shaped structures are arranged away from each other; the arrangement that the vertical sections of the T-shaped structures of the T-shaped rods 252 are away from each other can not only meet the limiting effect on their movement directions, ensure that the outer clamping claw 21 and the inner supporting claw 22 move stably along the established feeding direction path, but also provide compensation for the extra range extension space generated by the outer clamping claw 21 and the inner supporting claw 22 under the action of the transmission range extender 23. When the outer clamping claw 21 performs range extension and expansion, and when the inner supporting claw 22 performs range extension and contraction, the clearance distances formed between the two and the surface of the cast steel sleeve are both greater than the maximum outer diameter of the grinding wheel in the grinding wheel mechanism 11. The grinding wheel mechanisms 11 are provided in plural, and the number is at least two. The chuck 12, the claws 121, the outer clamping claws 21, the inner supporting claws 22, the transmission range extender 23, the rack limiting member 24 and the sliding limiting member 25 are all correspondingly provided in plural;The driving of the two chucks 12 is opposite. When one chuck 12 cooperates with the grinding wheel grinding mechanism 11 to grind the inner wall of the cast steel sleeve, the other chuck 12 cooperates with the corresponding grinding wheel grinding mechanism 11 to grind the outer wall of the cast steel sleeve. After the cast steel sleeve completes the grinding operation on the current surface, there is no need to remove the cast steel sleeve from the chuck 12. By directly driving the corresponding chuck 12, the components are operated according to the operation steps opposite to the current ones, that is, the chuck 12 that originally performed the inner wall grinding is converted to drive the outer clamping jaws 21 to extend and expand outward, and the inner supporting jaws 22 expand outward to support the inner wall for outer wall grinding; the chuck 12 that originally performed the outer wall grinding is converted to drive the outer clamping jaws 21 to clamp the outer wall, and the inner supporting jaws 22 contract to the center of the inner wall for inner wall grinding, realizing the independent operation of multiple workstations. The chuck 12 and the grinding wheel grinding mechanism 11 are both installed on the grinding machine tool, and the grinding machine tool provides a stable processing platform for the equipment. The chuck 12 is driven by a built-in driving mechanism of the grinding machine tool, and the driving mechanism is connected by a servo motor through a reducer and a lead screw transmission mechanism to achieve precise control of the rotation angle of the chuck 12; at the same time, the servo motor drives the clamping jaws 121 to move radially along the chuck 12 through another set of independent lead screw nut pairs. This is the same driving principle as the existing chuck fixture, so that multiple driving clamping jaws 121 move outward and inward synchronously to achieve clamping, which will not be elaborated here. The grinding wheel grinding mechanism 11 is a multi-axis linkage grinding unit, including but not limited to: a vertical working spindle, a horizontal transverse axis, and a horizontal longitudinal axis;

[0057] Among them, the vertical working spindle is used to install the grinding wheel and realize the linear feed of the grinding wheel in the Z direction; the horizontal transverse axis and the longitudinal axis can realize the linear feed of the grinding wheel in the X and Y directions.

[0058] Specifically, when the equipment is working, two cast steel sleeves are respectively placed on two groups of chucks 12, and the clamping jaws 121 are driven to move radially along the chuck 12 by the built-in driving mechanism of the grinding machine tool.

[0059] When the clamping jaws 121 move towards the direction close to the center of the chuck 12, the tooth columns 231 rotatably connected to both sides of the clamping jaws 121 move synchronously. Since the tooth columns 231 are meshed with the fixed rack 232 fixedly connected to the surface of the chuck 12, the tooth columns 231 are driven to rotate passively during the movement.

[0060] During the rotation of the tooth column 231, the sliding rack 233 meshed with it will be driven to move. Since the position of the fixed rack 232 is fixed, when the tooth column 231 rotates, its meshing relationship with the sliding rack 233 will amplify the movement of the claw 121. Specifically, the fixed rack 232 is in a stationary state, while the tooth column 231 is both rotating and moving with the claw 121. When the tooth column 231 rotates, a circumferential force that moves the sliding rack 233 is generated; at the same time, the tooth column 231 will apply a translational force to the sliding rack 233 as the claw 121 moves. Since the fixed rack 232 does not move, while the tooth column 231 rotates and moves, under the combined action of the circumferential force and the translational force, the movement of the sliding rack 233 will be greater than the movement when only a single force acts. Based on the movement of the above-mentioned tooth column 231, the range-increasing effect of the inner support claw 22 is achieved.

[0061] At the same time, the tooth column 231 under the outer clamp 21 will conflict with the vertical rack 242 during movement, compressing the spring 241. At this time, the vertical rack 242 restricts the rotation of the tooth column 231, so that the sliding rack 233 under the outer clamp 21 can only move normally with the clamping claw 121, and the range extension effect cannot be achieved.

[0062] Therefore, under the same moving distance of the clamping jaw 121, the movement of the inner support jaw 22 affected by the range-extending effect of the tooth column 231 is greater than the movement of the outer clamping jaw 21 which is not affected by the range-extending effect. At this time, the chuck 12 corresponds to the inner wall of the cast steel sleeve for grinding. The inner support jaws 22 move closer to each other due to the range-extending movement and shrink to the center of the inner wall of the cast steel sleeve, making room for grinding for the grinding wheel grinding mechanism 11, while the outer clamping jaw 21 clamps the outer wall of the cast steel sleeve to provide stable positioning for the grinding process.

[0063] The working logic of the other chuck 12 is opposite to that of the other chuck. When the clamping jaw 121 moves, the outer clamping jaw 21 realizes extended range motion and moves away from the outer wall of the cast steel sleeve, while the inner support jaw 22 moves normally and clamps the inner wall of the cast steel sleeve, so that the grinding wheel grinding mechanism 11 can grind the outer wall of the cast steel sleeve.

[0064] At this time, the two sets of grinding wheel grinding mechanisms 11 are started simultaneously to grind the inner and outer walls of the two cast steel sleeves respectively.

[0065] When the grinding operation is completed, the driving mechanism drives the claws 121 on the chuck 12 to move in the reverse direction, the structures of the above-mentioned components are reset, and the object of the range-extending action is switched.

[0066] The outer clamping jaw 21 of the chuck 12 originally used for grinding the inner wall now becomes a range-extending motion component, and the inner support jaw 22 is restricted to normal motion by the vertical rack 242, and is used for grinding the outer wall of the cast steel sleeve;

[0067] The original chuck 12 for polishing the outer wall is switched to the extended movement of the inner support claws 22, and the outer clamping claws 21 move normally, which is used to polish the inner wall of the cast steel sleeve.

[0068] Through the above dual-station design, on the one hand, the production progress is significantly accelerated. When polishing the inner and outer walls of the cast steel sleeve, there is no need to remove the workpiece, greatly reducing the loading and unloading time and effectively improving the processing efficiency of the equipment. On the other hand, the dual-station independent working mode can process cast steel sleeves of different specifications at the same time, realizing mixed-line production, meeting diversified processing requirements, significantly improving the practicability and application range of the equipment, and providing an efficient and flexible solution for the precision polishing of cast steel sleeves.

[0069] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0070] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast steel sleeve precision grinding device, comprising a grinding wheel grinding mechanism (11), a chuck (12) is installed below the grinding wheel grinding mechanism (11), and a plurality of claws (121) are installed inside the chuck (12), characterized in that: The top of the clamping jaw (121) does not exceed the upper surface of the chuck (12); the surface of the clamping jaw (121) is respectively provided with an outer clamping jaw (21) away from the center of the chuck (12) and an inner support jaw (22) close to the center of the chuck (12); the surface of the clamping jaw (121) is provided with a transmission range-extending member (23) capable of enabling the outer clamping jaw (21) and the inner support jaw (22) to perform range-extending motion; and the inner wall of the chuck (12) is provided with a rack stopper (24) for limiting the unidirectional range-extending movement of the outer clamping jaw (21) and the inner support jaw (22).

2. The precision grinding equipment for cast steel sleeve according to claim 1, characterized in that: The transmission range-extending component (23) comprises: Two tooth columns (231), both of which are rotatably connected to two sides of the claw (121); Four fixed racks (232), each two of the fixed racks (232) are arranged at the bottom of the corresponding tooth column (231), and the fixed racks 232 are fixedly connected to the surface of the chuck (12); Four sliding racks (233), each two of the sliding racks (233) are slidably connected to the top of each clamping claw (121), and the tops of each two sliding racks (233) are respectively fixedly connected to the bottoms of the outer clamping claw (21) and the inner supporting claw (22); The tooth column (231), the fixed rack (232) and the sliding rack (233) are all meshed with each other.

3. The precision grinding equipment for cast steel sleeve according to claim 2, characterized in that: The sliding rack (233) and the fixed rack (232) are both located on two lines tangent to the tooth column (231) from top to bottom, and the sliding rack (233) is arranged close to the clamping claw (121), and the fixed rack (232) is arranged away from the clamping claw (121); this position layout enables when the clamping claw (121) drives the tooth column (231) to move, the fixed rack (232) provides a meshing basis for the tooth column (231), and the sliding rack (233) drives the outer clamping claw (21) and the inner support claw (22) to perform extended range movement under the transmission of the tooth column (231).

4. The cast steel sleeve precision grinding equipment according to claim 1, characterized in that: The chuck (12) is provided with a plurality of limiting grooves inside, and the rack limiting member (24) comprises: A spring (241), wherein the spring (241) is fixedly connected to the interior of the limiting groove; A vertical rack (242), wherein the vertical rack (242) is slidably connected to the interior of the limiting groove, the vertical rack (242) is fixedly connected to the spring (241), and the vertical rack (242) is meshed with the tooth column (231).

5. The cast steel sleeve precision grinding equipment according to claim 1, characterized in that: A sliding stopper (25) is installed inside the chuck (12) for maintaining the stable movement of the outer clamping jaw (21) and the inner support jaw (22), and the sliding stopper (25) comprises: A slide groove (251), wherein the slide groove (251) is formed on a side wall of the chuck (12); A T-shaped rod (252) is fixedly connected to the surfaces of the outer clamping claw (21) and the inner supporting claw (22) respectively, and the T-shaped rod (252) is slidably connected to the inside of the sliding groove (251).

6. The cast steel sleeve precision grinding equipment according to claim 5, characterized in that: Every two T-shaped rods (252) are respectively fixedly connected to the outer clamping claw (21) and the inner supporting claw (22), and the vertical sections of the T-shaped structures are arranged away from each other.

7. The cast steel sleeve precision grinding equipment according to claim 5, characterized in that: The grinding wheel grinding mechanism (11) is arranged in plural, the number of which is at least two, and the chuck (12), the clamping claw (121), the outer clamping claw (21), the inner support claw (22), the transmission range extender (23), the rack limiter (24) and the sliding limiter (25) are all arranged in plural accordingly.

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