Workpiece grinding equipment with stable feeding function

Abstract

The invention relates to the field of machine manufacturing, in particular to stable feeding workpiece grinding equipment which structurally comprises a grinding machine base, a lifting guide rail is vertically arranged on the grinding machine base, a sliding seat is mounted on the lifting guide rail, and a coarse grinding disc module and a fine grinding disc module are sequentially mounted on the front side of the sliding seat in the axial direction; a power switching module is embedded in the sliding seat and is in transmission connection with the coarse grinding disc module and the fine grinding disc module, a radial expansion and contraction control module is arranged on the rear side of the coarse grinding disc module, and the radial expansion and contraction control module controls radial expansion and contraction of the coarse grinding disc module; the grinding machine has the beneficial effects that the coarse grinding disc module and the fine grinding disc module which are coaxial are integrated and matched with the power switching module to achieve switching of the coarse grinding disc module and the fine grinding disc module, equipment machining integration is guaranteed, full-process machining from large-allowance coarse grinding to fine grinding of a workpiece can be completed without replacing equipment or a grinding wheel, the fine grinding disc works only in the fine finishing stage, and machining efficiency is improved. And unnecessary abrasion of the fine grinding disc is reduced.

Description

Technical Field

[0001] This invention relates to a workpiece grinding device with stable feed, belonging to the field of mechanical manufacturing. Background Technology

[0002] In the field of machining, grinding machines are precision equipment that rely on the rotation of grinding wheels to cut workpieces. Through the relative movement between the grinding wheel and the workpiece, the abrasive grains on the surface of the grinding wheel remove the excess material from the workpiece surface. Through repeated grinding, the dimensions and surface accuracy of the workpiece are gradually adjusted to meet the processing and use requirements of mechanical parts. It is an important piece of equipment for achieving precision machining of workpieces in the machinery manufacturing industry.

[0003] When existing grinding machines are used to handle the large amount of workpiece material removal, they either need to pre-process the material using other equipment to reduce the material material before grinding, or they need to use a fine grinding wheel to grind the material material back and forth for a long time to complete the removal of all the material material. This has the problems of complicated processing procedures, time-consuming equipment switching or low processing efficiency. In addition, the fine grinding wheel has to bear a lot of material removal work, which leads to accelerated wear and affects its service life and the accuracy and stability of subsequent fine machining. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a workpiece grinding device with stable feed to solve the problems of existing grinding machines when dealing with the need to remove large amounts of workpiece material. These machines either require pre-processing with other equipment to reduce the material material before grinding, or they directly use fine grinding wheels to grind the material material for a long time to complete the removal of all the material material. This results in a cumbersome processing procedure, time-consuming equipment switching, or low processing efficiency. Furthermore, the fine grinding wheels have to bear a large amount of material removal work, which leads to accelerated wear, affecting their service life and the accuracy and stability of subsequent fine machining.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a workpiece grinding device with stable feed, the structure of which includes: a grinding machine base, a lifting guide rail vertically arranged on the grinding machine base, a sliding seat slidably installed on the lifting guide rail, a coarse grinding disc module and a fine grinding disc module sequentially installed along the axial direction on the front side of the sliding seat, the coarse grinding disc module being located behind the fine grinding disc module; A drive motor is provided on the rear side of the sliding seat, and a power switching module is embedded inside the sliding seat. The power switching module is connected to the drive motor, the coarse grinding disc module, and the fine grinding disc module. A radial tension and contraction control module is provided on the rear side of the coarse grinding disc module, and the radial tension and contraction control module controls the radial extension and retraction of the coarse grinding disc module. When the coarse grinding disc module is in a retracted state, its maximum circumferential diameter is smaller than that of the fine grinding disc module. When the coarse grinding disc module is in an open state, its maximum circumferential diameter is larger than that of the fine grinding disc module, so as to perform large-margin coarse grinding.

[0006] Preferably, the radial tension control module is axially mounted on the rear side of the coarse grinding disc module; The coarse grinding disc module includes a rotary transmission disc, a radial sliding block, a segmented arc-shaped grinding stone, and a limiting sliding block. The rotary transmission disc has several transmission disc grooves that are radially distributed outward from the axis as the center point. Several radial sliding blocks are slidably arranged on the transmission disc grooves. The segmented arc-shaped grinding stone is fastened to the outside of the radial sliding block by bolts. A horizontal slide rail is provided on the inner side of the radial sliding slider. A limit slider is slidably arranged between the horizontal slide rail and the radial slide rail on the rotary transmission disk. An elastic limit module is also provided inside the rotary transmission disk.

[0007] Preferably, a non-rotating sleeve spindle is fixedly installed inside the lifting guide rail; The radial tension control module includes a slide rail base, a push block, a transmission rod, a drive disk, and a linear actuator. The slide rail base is provided with several radial tension slide rails corresponding to the radial displacement slider. The push block is slidably arranged on the radial tension slide rail, and the head of the push block is provided with a locking and spring-back mechanism. A drive disk is slidably mounted on the main shaft, and a linear actuator is fastened to the rear side of the drive disk. The drive disk is axially connected to several push blocks through several transmission rods.

[0008] Preferably, the radial sliding block has a relief groove in the middle that matches the pushing block. The relief groove has movable limiting blocks arranged symmetrically on the left and right sides. A limiting force spring is installed between the movable limiting block and the radial sliding block. The limiting force spring always applies an outward force to the two symmetrical movable limiting blocks. The movable limiting block has a first inclined surface on the side facing the push block, and the head of the push block has a second inclined surface adapted to the first inclined surface. The locking rebound mechanism also includes a movable block, which is movably disposed at the head of the push block in the front-back direction, and the movable block has a third inclined surface opposite to the first inclined surface. The push block only comes into contact with the bottom of the clearance groove during the process of pushing out several radial sliding blocks. During the retraction, retraction locking, and retraction of the coarse grinding disc module, the push block does not come into contact with the bottom of the clearance groove.

[0009] Preferably, the elastic limiting module includes a first annular limiting plate and a second annular limiting plate. The inner surface of the first annular limiting plate is provided with a limiting plate mounting groove that is adapted to the second annular limiting plate. The first annular limiting plate and the second annular limiting plate are coaxially sleeved and installed. A plurality of first limiting protrusions are fastened to the first annular limiting plate, and a plurality of second limiting protrusions are fastened to the second annular limiting plate, with the first limiting protrusions and the second limiting protrusions corresponding to and abutting against each other. A spring is provided between the first limiting protrusion and the corresponding second limiting protrusion. The elastic force of the spring keeps the first limiting protrusion and the second limiting protrusion in contact at all times. The heads of the first limiting protrusion and the second limiting protrusion are provided with arc-shaped ramp surfaces, and the arc-shaped ramp surfaces are exposed in the slide rails opened on the rotary transmission disk for elastically limiting the limiting slider.

[0010] Preferably, the power switching module includes a first drive shaft, a second drive shaft, and a telescopic main shaft. The first drive shaft is coaxially sleeved inside the second drive shaft. The first drive shaft is connected to the fine grinding disc module, and the second drive shaft is connected to the rotating drive disc of the coarse grinding disc module. The outer wall of the telescopic spindle is provided with independent transmission protrusions corresponding to the first transmission shaft and the second transmission shaft, respectively. The transmission protrusions are used to realize the individual transmission limit between the telescopic spindle and the corresponding transmission shaft. The power switching module also includes a drive cylinder and a vertical transmission rod. The drive cylinder is fixedly installed above the sleeve main shaft, and the output end of the drive cylinder is connected to the telescopic main shaft through the vertical transmission rod.

[0011] Preferably, an electromagnetic chuck seat is slidably arranged on the grinding machine base, and the electromagnetic chuck seat is used to support and fix the workpiece. The left and right feed transmission system of the electromagnetic chuck base is equipped with a backlash-eliminating nut. The backlash-eliminating nut is connected to the servo motor that drives the electromagnetic chuck base to move. The transmission gap is reduced by a special nut pre-tightening combination structure. The electromagnetic chuck seat and the grinding machine base are connected by a movable double V-shaped guide rail. The double V-shaped guide rail includes a fixed-end V-shaped guide rail block, a movable-end V-shaped guide rail block that can move slightly laterally, and a guide key.

[0012] The workpiece grinding equipment with stable feed according to the present invention has the following effects: 1. By integrating coaxial coarse grinding disc and fine grinding disc modules, and using a power switching module to switch between the two, the equipment ensures the integrity of processing, allowing the entire process of workpiece processing from large-mass coarse grinding to fine grinding to be completed without changing equipment or grinding wheels. It also allows the fine grinding disc to work only in the fine dressing stage, reducing unnecessary wear on the fine grinding disc, extending its service life, reducing the frequency of replacement, and ensuring the stability of processing accuracy.

[0013] 2. By designing a transmission structure in which the coarse grinding disc module rotates independently and is separated from the radial tension and contraction control module, the power of the drive motor is applied only to the rotating parts of the coarse grinding disc module. The radial tension and contraction control module does not participate in the rotational motion. This reduces the rotational drive pressure of the motor, improves the power utilization efficiency, avoids the additional wear caused by the radial tension and contraction control module due to its rotation, reduces its damage rate, and extends the overall maintenance cycle of the equipment.

[0014] 3. By adopting a single-motor drive and coaxially arranged coarse and fine grinding discs, the traditional dual-motor drive scheme is replaced. This not only simplifies the equipment structure and reduces energy consumption, but also, because the two discs are coaxial and have relatively fixed diameters, the workpiece only needs to be clamped once to complete the two processes of coarse and fine grinding. There is no need for repeated clamping and adjustment of alignment, which effectively avoids the positioning error caused by multiple clamping. Attached Figure Description

[0015] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a workpiece grinding device with stable feed according to the present invention.

[0016] Figure 2 This is a partial cross-sectional view of the present invention.

[0017] Figure 3 For the present invention Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the axial mating structure of the fine grinding disc module, the coarse grinding disc module, and the radial tension control module of the present invention.

[0019] Figure 5 This is a cross-sectional view of the rotating transmission disc of the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the first and second annular limiting disks of the present invention.

[0021] Figure 7 This is a detailed structural diagram of the radial tension control module of the present invention.

[0022] Figure 8 This is a schematic diagram of the sliding seat and related components of the present invention.

[0023] Figure 9 This is a cross-sectional view of the second transmission shaft of the present invention.

[0024] Figure 10 This is a schematic diagram of the gap-eliminating nut and double V-shaped guide rail structure of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Grinding machine base; 12. Lifting guide rail; 13. Sliding seat; 14. Drive motor; 15. Spindle mounting; 16. Electromagnetic chuck seat; 2. Fine grinding disc module; 3. Rough grinding disc module; 31. Rotary transmission disc; 311. Transmission disc groove; 32. Radial sliding block; 321. Horizontal slide rail; 322. Clearance groove; 3221. Movable limit block; 32211. First inclined surface; 3222. Limiting force spring; 33. Segmented arc-shaped grinding stone; 34. Limiting slider; 35. Elastic limit module; 351. First annular limiting disc; 3511. Limiting disc mounting groove; 3512. First limiting protrusion; 352. Second annular limiting disc; 3521. Second limiting protrusion; 353. Protrusion force spring; 354. Arc-shaped ramp surface; 4. Power switching module; 41. First drive shaft; 42. Second drive shaft; 43. Telescopic main shaft; 431. Transmission protrusion; 44. Drive cylinder; 45. Vertical transmission rod; 5. Radial tension / contraction control module; 51. Slide rail base; 511. Radial tension / contraction slide rail; 52. Push block; 521. Second inclined plane; 53. Transmission rod; 54. Drive disk; 55. Linear actuation component; 56. Locking and springback mechanism; 561. Movable block; 5611. Third inclined plane; 6. Clearance-free nuts; 7. Double V-shaped guide rail; 71. Fixed-end V-shaped guide rail block; 72. Movable-end V-shaped guide rail; 73. Guide key. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies are not connected through a transitional structure, but rather formed as a whole through a connecting structure. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Please see Figures 1 to 10 This invention provides a workpiece grinding device with stable feed. The technical solution is as follows: The workpiece grinding device with stable feed disclosed in this application addresses the technical pain points of traditional grinding machines, such as the need to replace equipment or grinding wheels when processing large-mass workpieces, rapid wear of fine grinding wheels, and difficulty in balancing processing accuracy and efficiency. It integrates a coarse grinding disc module 3 and a fine grinding disc module 2, and uses a radial tension / contraction control module 5 to adjust the radial opening and contraction of the coarse grinding disc. Combined with a power switching module 4, it enables independent switching between coarse and fine grinding power, achieving uninterrupted coarse-fine grinding integrated processing on the same machine. This reduces unnecessary wear of the fine grinding wheel, improves workpiece processing consistency, and extends the service life of the grinding wheel.

[0031] The grinding machine base 1 serves as the overall load-bearing foundation of the equipment, providing installation and support for all components. The lifting guide rail 12, together with the sliding seat 13, enables the lifting and adjustment of the grinding module, which can adapt to the processing requirements of workpieces of different heights. The spindle 15 provides an installation and rotation support carrier for each transmission component. The electromagnetic chuck seat 16 is used to adsorb and fix the workpiece, ensuring the positional stability of the workpiece during processing.

[0032] The fine grinding wheel module 2 consists of a fine grinding wheel and a matching transmission structure, and is responsible for the fine grinding and precision finishing of the workpiece. The coarse grinding wheel module 3 is the core component for removing large amounts of workpiece material. It includes a rotary transmission disk 31, a radial sliding block 32, a segmented arc-shaped grinding stone 33, and an elastic limiting module 35. The rotary transmission disk 31 drives the radial sliding block 32 to rotate. The radial sliding block 32 can slide radially along its own horizontal slide rail 321, thereby driving the segmented arc-shaped grinding stone 33 to adjust its position. The elastic limiting module 35 provides elastic limit for the radial sliding block 32 to prevent it from excessive displacement when it is open and not being ground.

[0033] The radial tension control module 5, which is composed of a slide rail base 51, a push block 52, a transmission rod 53, a drive disc 54, a linear actuator 55, and a locking and spring-back mechanism 56, is a key component for realizing the radial dimension adjustment of the coarse grinding disc. The power switching module 4 includes a first transmission shaft 41, a second transmission shaft 42, a telescopic main shaft 43, a drive cylinder 44, and a vertical transmission rod 5345, and is responsible for the power switching between the coarse grinding disc module 3 and the fine grinding disc module 2.

[0034] Overall principle: The equipment uses the grinding machine base 1 as the installation foundation. The workpiece is fixed by the electromagnetic chuck seat 16. After the drive motor 14 provides the core power, the power is selectively transmitted to the coarse grinding disc module 3 or the fine grinding disc module 2 through the power switching module 4. In the coarse grinding stage, the radial expansion and contraction adjustment of the coarse grinding disc module 3 is used to quickly remove the large amount of workpiece material. In the fine grinding stage, the equipment switches to the fine grinding disc module 2 to complete the precision finishing of the workpiece. At the same time, the backlash elimination mechanism of the ball screw and the double 7-type guide rail VV are used to ensure the accuracy of the feed transmission and the workpiece sliding, respectively.

[0035] The principle of coarse grinding disc opening and closing: The radial dimension adjustment of the coarse grinding disc is dominated by the radial expansion and contraction control module 5, and its operation is divided into two core stages: opening and closing. Opening process: The linear actuator 55 drives the drive disk 54 to move. The drive disk 54 pushes the push block 52 to move radially outward along the slide rail of the slide rail base 51 via the transmission rod 53. The second inclined surface 521 of the push block 52 abuts against the first inclined surface 32211 of the slider movement limit block 3221 on the radial slider 32, causing the slider movement limit to retract. The head of the push block 52 abuts against the bottom of the groove 322 of the radial slider 32. Utilizing the thrust characteristics, the radial slider 32 is driven to slide along its own horizontal slide rail 321 to the outside of the rotating drive disk 31. The radial slider 32 simultaneously drives the segmented arc-shaped grinding stone 33 to move outward, realizing the radial opening of the coarse grinding disk. At this time, the linear actuator 55 starts the retraction action, driving the drive disk 54 to retract. During this process, the third inclined surface 5611 on the movable block 561, which is slidably set at the head of the push block 52, abuts against the movable limiting block 3221 on the radial sliding block 32, pushing the movable limiting block 3221 to retract. The drive disk 54 pulls all the push blocks 52 to retract synchronously to the bottom position along the radial tension and contraction slide rail 511 through the transmission rod 53. During this process, the first limiting protrusion 3512 of the first annular limiting disk 351 and the second limiting protrusion 3521 of the second annular limiting disk 352 abut against each other, providing support for the radial sliding block 32. After the push block 52 retracts to the bottom, it completely disengages from the clearance groove 322 of the radial sliding block 32, forming a clearance space, and will not cause any interference to the normal rotational movement of the rotating transmission disk 31 and the radial sliding block 32.

[0036] Contraction process: The linear actuator 55 pushes the drive disk 54, which in turn pushes all the push blocks 52 outward along the radial tension slide rail 511 of the slide rail base 51 via the transmission rod 53. When the push block 52 slides to the point where the second inclined surface 521 of its head abuts against the first inclined surface 32211 of the movable limiting block 3221 on the radial sliding slider 32, the movable limiting block 3221 retracts inward against the outward force of the limiting force spring 3222. During this process, the movable limiting block 3221 does not contact the movable block 561 at the head of the push block 52, and the head of the push block 52 never abuts against the bottom of the clearance groove 322 on the radial sliding slider 32. The movable limiting block 3221 retracts inward through the pushing force of the limiting force spring 3222. The linear actuator 55 forms a reverse hook engagement with the head of the push block 52. After the hook engagement is completed, the linear actuator 55 retracts in the opposite direction, causing the drive disk 54 to contract. This, in turn, pulls the push block 52 inward along the radial tension slide rail 511. During this process, the head of the push block 52 still does not contact the bottom of the clearance groove 322. The pulling force is transmitted only through the reverse hook limit of the movable block 561 and the movable limit block 3221. Finally, the radial sliding slider 32 is pulled to the innermost position. After the push block 52 retracts into place, it still maintains the reverse hook limit state through the movable block 561 and the movable limit block 3221. At this time, the fine grinding disk module 2 can start working. If rough grinding is required again, the linear actuator 55 only needs to push the drive disk 54 again to drive the push block 52 to move outward. Throughout the entire contraction process, whether the push block 52 slides outward or retracts inward, its head does not come into contact with the bottom of the avoidance groove 322. Only during the process of the coarse grinding disc opening and pushing will the head of the push block 52 come into contact with the bottom of the avoidance groove 322.

[0037] Power switching principle: The power switching module 4 controls the axial movement of the telescopic spindle 43 through the drive cylinder 44, thereby realizing the independent transmission of coarse and fine grinding power. When the drive cylinder 44 pushes the telescopic spindle 43 downward, the limiting protrusion on the telescopic spindle 43 engages with the second transmission shaft 42. The power of the drive motor 14 is transmitted to the rotating transmission disk 31 through the telescopic spindle 43 and the second transmission shaft 42, driving the coarse grinding disk module 3 to rotate and start the coarse grinding process. At this time, the telescopic spindle 43 is not in contact with the first transmission shaft 41, and the fine grinding disk module 2 is in a stopped state. When the drive cylinder 44 pulls the telescopic spindle 43 upward, the limiting protrusion engages with the first transmission shaft 41, and the power is transmitted to the fine grinding disk module 2 through the first transmission shaft 41, starting the fine grinding process. At this time, the telescopic spindle 43 disengages from the second transmission shaft 42, and the coarse grinding disk module 3 stops rotating.

[0038] Device Operation Flow: Workpiece Clamping: Place the workpiece to be processed on the electromagnetic chuck seat 16 and activate the electromagnetic adsorption function to firmly fix the workpiece on the chuck seat, preventing loosening during processing. Rough Grinding Preparation: Adjust the height of the rough grinding disc module 3 via the lifting guide rail 12 to match the workpiece's processing surface; simultaneously, the radial tension control module 5 drives the rough grinding disc to open to the preset processing diameter, preparing the dimensions for the rough grinding process. Rough Grinding Process: The power switching module 4 switches the power to the second transmission shaft 42, driving the rotating transmission disc 31 of the rough grinding disc module 3 to rotate, and the segmented arc-shaped grinding stone 33 performs large-scale rough grinding on the workpiece; at the same time, the servo motor drives the electromagnetic chuck seat 16 through the backlash-eliminating nut 6 to move the workpiece back and forth, ensuring the uniformity of rough grinding on the workpiece surface and avoiding uneven removal of local allowances. Rough grinding completed: Once the rough grinding allowance of the workpiece reaches the preset standard, the power switching module 4 cuts off the power to the rough grinding disc module 3, the rough grinding disc stops rotating, and the radial tension control module 5 drives the rough grinding disc to retract to its initial position, freeing up processing space for the fine grinding process. Fine grinding process: The power switching module 4 switches the power to the first drive shaft 41, driving the fine grinding disc module 2 to rotate, performing fine grinding and precision finishing on the surface of the workpiece that has undergone rough grinding; the electromagnetic chuck seat 16 continues to drive the workpiece to reciprocate, ensuring that the surface accuracy and roughness of the workpiece after fine grinding meet the processing requirements.

[0039] The principle and application of the backlash-eliminating nut 6: The backlash-eliminating nut 6 configured in the electromagnetic chuck seat 16 feed system of this equipment is the Haydonkerk Pittman C series MP backlash-eliminating nut 6. Its core principle is to use a special nut preload combination structure to use preload force to eliminate the fit clearance between the ball screw and the nut.

[0040] The principle and application of the movable double-type guide rail 7: The movable double-type guide rail 7 used between the electromagnetic chuck seat 16 and the grinding machine base 1 consists of a fixed-end guide rail block 71, a movable-end guide rail block 72 that can move slightly laterally, and a guide key 73. The fixed-end type guide block 71 provides a basic guiding reference; The movable end type guide rail block 72 can compensate for assembly errors during equipment installation and wear errors after long-term use by moving slightly laterally; The guide key 73 further constrains the sliding direction of the electromagnetic chuck seat 16 to prevent it from deviating.

[0041] The function of this structure is to ensure the straightness of the electromagnetic chuck seat 16 during the left and right sliding process, so that the workpiece and the grinding disc always maintain a stable relative motion trajectory.

[0042] Beneficial effects: 1. Improved processing efficiency: The integrated coarse and fine grinding modules allow for integrated processing of workpieces without the need to change equipment or grinding wheels, saving the time spent on equipment switching and grinding wheel replacement in traditional grinding machines, thus improving overall processing efficiency.

[0043] 2. Extended grinding wheel life: The coarse grinding process is handled by the coarse grinding disc module 3, and the fine grinding wheel is only used in the fine dressing stage. This avoids the fine grinding wheel from undertaking the work of removing large amounts of material, effectively reducing the wear of the fine grinding wheel, extending its service life, and ensuring the stability of fine grinding accuracy.

[0044] 3. Improved ease of operation: Through the automated control of the power switching module 4 and the radial tension control module 5, one-click switching between coarse and fine grinding processes and automatic adjustment of the coarse grinding disc size are realized, reducing the difficulty of operation for operators and improving the automation level of the equipment.

[0045] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A workpiece grinding device with stable feed, comprising a grinding machine base (1), characterized in that: A lifting guide rail (12) is vertically arranged on the grinding machine base (1), and a sliding seat (13) is slidably installed on the lifting guide rail (12). A coarse grinding disc module (3) and a fine grinding disc module (2) are sequentially installed on the front side of the sliding seat (13) along the axial direction. The coarse grinding disc module (3) is located on the rear side of the fine grinding disc module (2). A drive motor (14) is provided on the rear side of the sliding seat (13). A power switching module (4) is embedded inside the sliding seat (13). The power switching module (4) is connected to the drive motor (14), the coarse grinding disc module (3), and the fine grinding disc module (2). A radial tension and contraction control module (5) is provided on the rear side of the coarse grinding disc module (3). The radial tension and contraction control module (5) controls the radial extension and retraction of the coarse grinding disc module (3). When the coarse grinding disc module (3) is in a retracted state, its maximum circumferential diameter is smaller than that of the fine grinding disc module (2). When the coarse grinding disc module (3) is in an open state, its maximum circumferential diameter is larger than that of the fine grinding disc module (2) to perform large-margin coarse grinding.

2. The workpiece grinding equipment with stable feed according to claim 1, characterized in that: The radial tension control module (5) is axially mounted on the rear side of the coarse grinding disc module (3); The coarse grinding disc module (3) includes a rotary transmission disc (31), a radial sliding block (32), a segmented arc-shaped grinding stone (33), and a limiting slider (34). The rotary transmission disc (31) has several transmission disc grooves (311) that are radially distributed outward from the axis as the center point. Several radial sliding blocks (32) are slidably arranged on the transmission disc grooves (311). The segmented arc-shaped grinding stone (33) is fastened to the outside of the radial sliding block (32) by bolts. The radial sliding slider (32) has a horizontal slide rail (321) on its inner side. A limit slider (34) is slidably arranged between the horizontal slide rail (321) and the radial slide rail on the rotary transmission disk (31). An elastic limit module (35) is also provided inside the rotary transmission disk (31).

3. The workpiece grinding equipment with stable feed according to claim 1, characterized in that: The lifting guide rail (12) is fixedly equipped with a non-rotating sleeve main shaft (15). The radial tension control module (5) includes a slide rail base (51), a push block (52), a transmission rod (53), a drive disk (54), and a linear actuator (55). The slide rail base (51) is provided with several radial tension slide rails (511) corresponding to the radial sliding slider (32). The push block (52) is slidably arranged on the radial tension slide rail (511). The head of the push block (52) is provided with a locking spring mechanism (56). A drive disk (54) is slidably mounted on the main shaft (15). A linear actuator (55) is fastened to the rear side of the drive disk (54). The drive disk (54) is axially connected to several push blocks (52) through several transmission rods (53).

4. The workpiece grinding equipment with stable feed according to claim 3, characterized in that: The radial sliding block (32) has a relief groove (322) in the middle that matches the push block (52). The relief groove (322) has movable limiting blocks (3221) symmetrically arranged on the left and right sides. A limiting force spring (3222) is installed between the movable limiting block (3221) and the radial sliding block (32). The limiting force spring (3222) always applies an outward force to the two symmetrical movable limiting blocks (3221). The movable limiting block (3221) has a first inclined surface (32211) on the side facing the push block (52), and the head of the push block (52) has a second inclined surface (521) that matches the first inclined surface (32211). The locking rebound mechanism (56) also includes a movable block (561), which is movably disposed at the head of the push block (52) in the front-back direction. The movable block (561) has a third inclined surface (5611) opposite to the first inclined surface (32211). The push block (52) only abuts against the bottom of the avoidance groove (322) during the process of pushing out several radial sliding blocks (32). During the process of the coarse grinding disc module (3) shrinking, shrinking and locking and shrinking back, the push block (52) does not abut against the bottom of the avoidance groove (322).

5. The workpiece grinding equipment with stable feed according to claim 2, characterized in that: The elastic limiting module (35) includes a first annular limiting plate (351) and a second annular limiting plate (352). The inner surface of the first annular limiting plate (351) is provided with a limiting plate mounting groove (3511) that is adapted to the second annular limiting plate (352). The first annular limiting plate (351) and the second annular limiting plate (352) are coaxially sleeved and installed. A plurality of first limiting protrusions (3512) are fastened to the first annular limiting plate (351), and a plurality of second limiting protrusions (3521) are fastened to the second annular limiting plate (352). The first limiting protrusions (3512) and the second limiting protrusions (3521) abut against each other. A protrusion force spring (353) is provided between the first limiting protrusion (3512) and the corresponding second limiting protrusion (3521). The elastic force of the protrusion force spring (353) keeps the first limiting protrusion (3512) and the second limiting protrusion (3521) in a contact state. The heads of the first limiting protrusion (3512) and the second limiting protrusion (3521) are provided with arc-shaped ramp surfaces (354), and the arc-shaped ramp surfaces (354) are exposed in the slide rail opened on the rotating transmission disk (31) for elastically limiting the limiting slider (34).

6. The workpiece grinding equipment with stable feed according to claim 3, characterized in that: The power switching module (4) includes a first drive shaft (41), a second drive shaft (42), and a telescopic main shaft (43). The first drive shaft (41) is coaxially sleeved inside the second drive shaft (42). The first drive shaft (41) is connected to the fine grinding disc module (2) in a transmission connection. The second drive shaft (42) is connected to the rotating transmission disc (31) of the coarse grinding disc module (3) in a transmission connection. The telescopic spindle (43) has independent transmission protrusions (431) on its outer wall, which are respectively corresponding to the first transmission shaft (41) and the second transmission shaft (42). The transmission protrusions (431) are used to realize the individual transmission limit between the telescopic spindle (43) and the corresponding transmission shaft. The power switching module (4) also includes a drive cylinder (44) and a vertical transmission rod (53) (45). The drive cylinder (44) is fixedly installed above the sleeve main shaft (15). The output end of the drive cylinder (44) is connected to the telescopic main shaft (43) through the vertical transmission rod (53) (45).

7. The workpiece grinding equipment with stable feed according to claim 1, characterized in that: An electromagnetic chuck seat (16) is slidably arranged on the grinding machine base (1) to the left and right. The electromagnetic chuck seat (16) is used to support and fix the workpiece. The left and right feed transmission system of the electromagnetic chuck base (16) is equipped with a backlash-eliminating nut (6). The backlash-eliminating nut (6) is connected to the servo motor that drives the electromagnetic chuck base (16) to move. The transmission gap is reduced by a special nut pre-tightening combination structure. The electromagnetic chuck seat (16) is connected to the grinding machine base (1) by a movable double V-shaped guide rail (7). The double V-shaped guide rail (7) includes a fixed end V-shaped guide rail block (71), a movable end V-shaped guide rail block (72) that can move slightly laterally, and a guide key (73).

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