Screw polishing device

Abstract

The application discloses a screw polishing device, which comprises a rack, a polishing head mechanism and a screw, wherein the rack is fixedly provided with a grinding head moving mechanism, a pressing mechanism and a power rotating mechanism. The screw is rotatably arranged on the power rotating mechanism and comprises a working end and a non-working end. The polishing head mechanism is slidably connected with the grinding head moving mechanism. The polishing head mechanism comprises a grinding wheel, a vertical moving assembly and a rotating driving assembly, and can realize the movement of the grinding wheel in the vertical direction and the rotation of the grinding wheel around an axis. The pressing mechanism comprises a pressing assembly and a pressing rubber roller. The pressing rubber roller cooperates with the power rotating mechanism to form a containing cavity, and the non-working end of the screw is arranged in the containing cavity and driven to rotate by friction. The mechanical polishing mode is adopted to replace the traditional high-pressure water cleaning, so that the equipment investment cost is effectively reduced. The pressing rubber roller cooperates with the power rotating mechanism to indirectly drive the screw to rotate by friction, manual operation is facilitated, and a complex clamping mechanism is avoided. The polishing head mechanism can adaptively move in the vertical direction along with the ups and downs of screw grooves, so that the polishing effect is ensured and the screw is prevented from being damaged by polishing.

Description

Technical Field

[0001] This invention relates to the field of plastic extrusion equipment, and more specifically to a screw grinding device. Background Technology

[0002] During long-term production, molten plastic, carbon deposits, and hard fillers easily adhere to the screw grooves of plastic extruders. Especially during color and material changes, if the residual material on the screw surface is not thoroughly cleaned, it can easily lead to quality problems such as color mixing and excessive impurities in the product. Therefore, thorough cleaning and maintenance of the screw is necessary. Currently, most mainstream screw cleaning equipment in the industry uses a 200MPa high-pressure water pump as the core cleaning power source. Although this type of equipment has good versatility and cleaning effect, and can adapt to various screw specifications and remove surface materials, it suffers from high equipment cost, high maintenance cost, and high energy consumption. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a screw grinding device to solve the technical problems of high purchase and maintenance costs, high energy consumption, high operating costs, and high corrosion resistance requirements caused by the reliance on high-pressure water pumps in existing screw cleaning equipment. At the same time, it can realize multi-size adaptive grinding for different screws.

[0004] This invention proposes a screw grinding device, comprising: A frame, on which a grinding head moving mechanism, a clamping mechanism and a power rotation mechanism are fixedly mounted; A screw, rotatably mounted on the power rotation mechanism, the screw including a working end and a non-working end, the shaft diameter of the non-working end being smaller than the shaft diameter of the working end; A grinding head mechanism is slidably connected to a grinding head moving mechanism. The grinding head mechanism includes a mounting plate, a grinding wheel for grinding the screw, and a vertical moving component and a rotary driving component fixed on the mounting plate. The vertical moving component is connected to the rotary driving component and can drive the rotary driving component to move adaptively in the vertical direction. The rotary driving component is connected to the grinding wheel and can drive the grinding wheel to rotate around an axis. The clamping mechanism includes a pressing component and a clamping roller. The pressing component is connected to the clamping roller, and the height of the clamping roller is adjusted by the pressing component to accommodate screws of different diameters. The clamping roller cooperates with the power rotation mechanism to form a receiving cavity. The non-working end of the screw is located in the receiving cavity, and an adapter sleeve is fitted on the non-working end of the screw. The adapter sleeve has uniformly distributed set screws, and the adapter sleeve is connected to the screw through the set screws to transmit torque. The clamping roller presses against the adapter sleeve, and the screw is driven to rotate by the frictional force between the clamping roller, the power rotation mechanism, and the adapter sleeve.

[0005] In one embodiment, the clamping mechanism further includes a guide post and a spring, the pressing assembly includes a handwheel, a pressing screw and a connecting plate, the pressing screw is connected to the connecting plate, the pressing rubber roller is installed at the lower end of the connecting plate, the spring is sleeved on the guide post, and the pressing rubber roller and the connecting plate are connected by a floating hinge point.

[0006] In one embodiment, the rotation direction of the grinding wheel is opposite to the rotation direction of the screw.

[0007] In one embodiment, the vertical movement component includes a cylinder, one end of which is connected to the rotary drive component; the mounting plate has a guide rail, and the cylinder drives the rotary drive component to slide on the guide rail.

[0008] In one embodiment, the cylinder is connected to a cylinder stroke adjustment assembly, a pressure regulating valve, and a muffler. The cylinder stroke adjustment assembly is adjusted to accommodate grinding of screws with different diameters.

[0009] In one embodiment, the rotary drive assembly includes a drive motor, a transmission mechanism, a rotary shaft, and a grinding wheel that are slidably connected to the guide rail. The rotary shaft is driven by the drive motor through the transmission mechanism, and the grinding wheel is mounted on the rotary shaft and rotates with the rotary shaft. The transmission mechanism is a synchronous belt drive mechanism or a toothed chain drive mechanism.

[0010] In one embodiment, the rotating shaft is provided with a plurality of grinding wheels, and spacers are provided between adjacent grinding wheels; the rotating shaft is provided with a locking member for fixing the grinding wheels, the locking member being a locking nut, the locking nut having a knurled handle pattern, and the thread direction of the locking nut being opposite to the rotation direction of the grinding wheel.

[0011] In one embodiment, the power rotation mechanism includes a rotation drive, an active rotating roller, a passive rotating roller, and a support base fixedly mounted on the frame. The active rotating roller is driven to rotate by the rotation drive. The active rotating roller and the passive rotating roller are arranged side by side and fixedly mounted on the support base. The screw is placed on the active rotating roller and the passive rotating roller.

[0012] In one embodiment, the screw grinding apparatus further includes a plurality of support rollers for supporting the screw, the plurality of support rollers being spaced apart on the frame.

[0013] In one embodiment, the frame includes a flip-up door, a flip-up door drive mechanism, a dust collection box, and a cleaning port. The flip-up door is opened or closed by the flip-up door drive mechanism. The dust collection box is located below the grinding area of ​​the screw, and the cleaning port is located on the side of the dust collection box for cleaning grinding debris.

[0014] The screw grinding device provided by this invention includes a frame, a grinding head mechanism, and a screw. A grinding head moving mechanism, a clamping mechanism, and a power rotation mechanism are fixedly mounted on the frame. The screw is rotatably placed on the power rotation mechanism and includes a working end and a non-working end. The grinding head mechanism and the grinding head moving mechanism are slidably connected. The grinding head mechanism includes a grinding wheel, a vertical moving component, and a rotary drive component, enabling the grinding wheel to move vertically and rotate around its axis. The clamping mechanism includes a pressing component and a clamping roller. The clamping roller cooperates with the power rotation mechanism to form a receiving cavity, in which the non-working end of the screw is located. Frictional force drives the screw to rotate. This mechanical grinding method replaces traditional high-pressure water cleaning, effectively reducing equipment investment costs. The use of a clamping roller in conjunction with the power rotation mechanism, indirectly driving the screw rotation through friction, facilitates manual operation and avoids complex clamping mechanisms. The grinding head mechanism can move adaptively in the vertical direction according to the undulation of the screw groove, which can not only ensure the grinding effect, but also prevent the screw from being damaged by grinding. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the screw grinding device of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the frame of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of an embodiment of the screw grinding device (without frame) of the present invention; Figure 4 This is a schematic diagram of the structure of an embodiment of the power rotation mechanism of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of an embodiment of the grinding head of the present invention; Figure 6 yes Figure 5 An enlarged view of an embodiment at point I; Figure 7 This is a three-dimensional structural schematic diagram of an embodiment of the clamping mechanism of the present invention; Explanation of icon numbers:

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] During long-term production, molten plastic, carbon deposits, and hard fillers easily adhere to the screw grooves of plastic extruders. Especially during color and material changes, if the residual material on the screw surface is not thoroughly cleaned, it can easily lead to quality problems such as color mixing and excessive impurities in the product. Therefore, thorough cleaning and maintenance of the screw is necessary. Currently, most mainstream screw cleaning equipment in the industry uses a 200MPa high-pressure water pump as the core cleaning power source. Although this type of equipment has good versatility and cleaning effect, and can adapt to various screw specifications and remove surface materials, it suffers from high equipment cost, high maintenance cost, and high energy consumption.

[0023] This invention proposes a screw grinding device 1. Please refer to... Figures 1 to 7 The system includes: a frame 1, on which a grinding head moving mechanism 3, a clamping mechanism 4, and a power rotation mechanism 5 are fixedly mounted; a screw 100, which is rotatably placed on the power rotation mechanism 5, and the screw 100 includes a working end and a non-working end, the shaft diameter of the non-working end being smaller than that of the working end; a grinding head mechanism 2, which is slidably connected to the grinding head moving mechanism 3, and includes a mounting plate, a grinding wheel 26 for grinding the screw 100, and a vertical moving component and a rotary drive component fixed on the mounting plate; the vertical moving component is connected to the rotary drive component and can drive the rotary drive component to move adaptively in the vertical direction, and the rotary drive component is connected to the grinding wheel 26 and can drive the grinding wheel 26 to move adaptively in the vertical direction. 6. Rotate along the axis; the clamping mechanism 4 includes a pressing component 41 and a clamping roller 45. The pressing component 41 is connected to the clamping roller 45. The height of the clamping roller 45 is adjusted by the pressing component to adapt to screws 100 of different diameters. The clamping roller 45 cooperates with the power rotation mechanism 5 to form a receiving cavity. The non-working end of the screw 100 is located in the receiving cavity. The non-working end of the screw 100 is fitted with an adapter sleeve 101. The adapter sleeve 101 has uniformly distributed set screws. The adapter sleeve 101 is connected to the screw 100 through the set screws to transmit torque. The clamping roller 45 is pressed on the adapter sleeve 101. The screw 100 is driven to rotate by the friction between the clamping roller 45, the power rotation mechanism 5 and the adapter sleeve 101.

[0024] In this embodiment, the frame 1 mainly consists of an upward-opening door drive device 12, an upward-opening door 11, a cleaning port 14, and a dust collection box 13. The upward-opening door 11 is driven open or closed by the upward-opening door drive device 12 to facilitate the insertion and removal of the screw 100. The dust collection box 13 is arranged below the grinding area of ​​the screw 100 to collect the grinding debris. The dust collection box 13 can be connected to a corresponding dust collection device to improve the dust removal effect. The cleaning port 14 is located on the side of the dust collection box 13 to clean the collected grinding debris. The upward-opening door 11 is opened by the upward-opening door drive device 12, and the screw 100 to be ground is placed on the support roller 6 and the power rotation mechanism 5. The screw 100 includes a working end and a non-working end. The outer surface of the working end is machined with a spiral groove, and the non-working end is a splined shaft with a smaller shaft diameter than the working end. An adapter sleeve 101 is fitted onto the non-working end of the screw 100. The adapter sleeve 101 and the screw 100 are connected by evenly arranged set screws to transmit torque. The purpose of setting the adapter sleeve 101 is to prevent the pressure roller 45 from directly pressing on the screw 100, thereby achieving full coverage grinding of the working end of the screw 100. The grinding head moving mechanism 3 has a slide rail, and the grinding head mechanism 2 is mounted on the slide rail. The grinding head moving mechanism 3 drives the grinding head mechanism 2 to move along the axial direction of the screw 100 to perform full coverage grinding of the screw 100. Preferably, the grinding head moving mechanism 3 is a synchronous belt moving mechanism. The grinding head mechanism 2 includes a mounting plate, a grinding wheel 26 for grinding the screw 100, and a vertical moving component and a rotary drive component fixed on the mounting plate. The vertical moving component can drive the rotary drive component to move adaptively in the vertical direction, and the rotary drive component can drive the grinding wheel 26 to rotate around the axis. The rotation direction of the grinding wheel 26 is opposite to the rotation direction of the screw 100. As the grinding wheel 26 rotates, it tightens more and more, achieving a self-locking function and facilitating quick manual replacement of the grinding wheel 26. Preferably, the grinding wheel 26 is a steel wire wheel or a copper wire wheel. The clamping mechanism 4 includes a pressing component 41 and a clamping rubber roller 45. The height of the clamping rubber roller 45 is adjusted by the pressing component to accommodate screws 100 of different diameters.

[0025] Further, please refer to Figure 7 The pressing mechanism 4 also includes a guide post 42 and a spring 43. The pressing assembly 41 includes a handwheel, a pressing screw 411 and a connecting plate. The pressing screw 411 is connected to the connecting plate. The pressing roller 45 is installed at the lower end of the connecting plate. The spring 43 is sleeved on the guide post 42. The pressing roller 45 and the connecting plate are connected by a floating hinge point 44.

[0026] Specifically, the pressing screw 411 uses a trapezoidal or rectangular thread, which has a self-locking characteristic to prevent loosening under vibration conditions. A handwheel is fixedly installed at the upper end of the pressing screw 411, and the rim of the handwheel is covered with an anti-slip rubber layer to facilitate the operator to apply sufficient clamping force. The pressing screw 411 is connected to the thrust bearing on the upper surface of the connecting plate. The thrust bearing bears the axial clamping force while allowing the pressing screw 411 to rotate freely, reducing rotational resistance. Guide posts 42 are symmetrically arranged on both sides of the pressing screw 411, with two or four posts in total. The lower end of the guide posts 42 is fixedly connected to the connecting plate, providing precise guidance for the connecting plate and preventing the clamping roller 45 from deviating. The spring 43 is a cylindrical helical compression spring, which is sleeved on the guide post 42. Spring 43 provides anti-loosening preload. When the screw is fully tightened, spring 43 is in a compressed state, and its rebound force keeps the threaded pair of the pressing screw 411 in tight contact, preventing loosening of the threads due to equipment vibration. It also provides a buffering effect; when the screw 100 is placed, spring 43 can absorb impact loads, protecting the threaded pair and the frame 1. Furthermore, when there are minor unevennesses on the surface of the screw 100 or radial runout occurs during rotation, spring 43 allows the pressing roller 45 to float up and down, maintaining a relatively stable clamping force. The pressing roller 45 is installed at the lower end of the connecting plate. The floating hinge point 44 uses a spherical bearing or ball joint structure, located between the connecting plate and the pressing roller 45, allowing the pressing roller 45 to have a degree of freedom of swing. This automatically adapts to the installation position deviation of the adapter sleeve 101 and the coaxiality error during rotation, ensuring that the pressing roller 45 and the surface of the adapter sleeve 101 always maintain surface contact rather than line or point contact, increasing the contact area and improving friction transmission efficiency and stability.

[0027] Further, please refer to Figure 5 The vertical moving component includes a cylinder 21, one end of which is connected to the rotary drive component; the mounting plate has a guide rail 22, and the cylinder 21 drives the rotary drive component to slide on the guide rail 22.

[0028] Specifically, the cylinder barrel of cylinder 21 is rigidly fixed to the top of the mounting plate via a flange, and the piston rod end of cylinder 21 is connected to the rotary drive assembly via a floating joint. The floating joint allows for small angular deviations and radial offsets, compensating for installation errors and preventing the piston rod from bending or wearing the sealing ring due to lateral forces. Two linear guide rails 22 are symmetrically arranged on the mounting plate. The guide rails 22 are ball-bearing linear guide rails, and the guide rail sliders are rigidly connected to the motor mounting base of the rotary drive assembly via bolts. The guide rails 22 have high-precision guidance, ensuring that the grinding wheel 26 does not deviate horizontally during lifting and lowering. Cylinder 21 drives the rotary drive assembly and the grinding wheel 26 to move vertically along the guide rails 22, realizing the entry and exit of the grinding wheel 26. During grinding, the pneumatic system of cylinder 21 operates in floating mode: when the grinding wheel 26 contacts the surface of the screw 100, the overall gravity of the rotary drive assembly and the grinding wheel 26 acts downward, and the rod end of cylinder 21 maintains a certain back pressure through the pressure regulating valve 28, forming an upward supporting force. When the grinding wheel 26 encounters a protruding thread groove on the surface of the screw 100, the reaction force causes the grinding wheel 26 to move upward, increasing the air pressure at the rod end of the cylinder 21 and creating a buffering effect. When it encounters a concave thread groove, gravity causes the grinding wheel 26 to move downward and follow, reducing the air pressure. This adaptive mechanism allows the grinding wheel 26 to precisely follow the undulations of the thread profile of the screw 100, achieving full-depth grinding of the thread groove without the need for a complex CNC follow-up system. The preload of the guide rail 22 is adjustable, ensuring flexible and unhindered movement while eliminating gaps and preventing vibration.

[0029] Further, please refer to Figure 5 The cylinder 21 is connected to a cylinder stroke adjustment component 211, a pressure regulating valve 28 and a muffler. The cylinder stroke adjustment component 211 can be adjusted to adapt to the grinding of screws 100 of different diameters.

[0030] Specifically, the pressure regulating valve 28 is a precision pressure reducing valve, installed on the rod end of the cylinder 21, and features a pressure gauge display. By rotating the handle of the pressure regulating valve 28, the back pressure at the rod end of the cylinder 21 can be steplessly adjusted, thereby precisely controlling the contact pressure between the grinding wheel 26 and the screw 100. A muffler is installed at the exhaust port of the rodless end of the cylinder 21, employing a microporous bronze sintered filter element or a plastic sound-absorbing cotton structure. The cylinder stroke adjustment assembly 211 includes magnetic switches and mechanical limit bolts installed at both ends of the cylinder barrel of the cylinder 21. The magnetic switches detect the piston position and provide feedback to the control system for automated control; the mechanical limit bolts set the highest and lowest positions of the grinding wheel 26 to prevent overtravel. For screws 100 of different diameters, the initial height of the grinding wheel 26 needs to be adjusted: when grinding large-diameter screws, a higher lower limit is set via the cylinder stroke adjustment assembly 211; when grinding small-diameter screws, a lower lower limit is set. The combination of the four pairs of adapter sleeves 101 with the clamping mechanism allows the device to adapt to various specifications of screws 100 within different diameter ranges. During the grinding process, the air pressure of the pressure regulating valve 28 can be adjusted according to the grinding effect, indirectly adjusting the static friction between the grinding wheel 26 and the screw 100 to prevent the screw from being damaged during grinding.

[0031] Further, please refer to Figure 5 The rotary drive assembly includes a drive motor 23 slidably connected to the guide rail 22, a transmission mechanism 24, a rotary shaft 25, and a grinding wheel 26. The rotary shaft 25 is connected to the drive motor 23 via the transmission mechanism 24. The grinding wheel 26 is mounted on the rotary shaft 25 and rotates with the rotary shaft 25. The transmission mechanism 24 is a synchronous belt drive mechanism or a toothed chain drive mechanism.

[0032] Specifically, the drive motor 23 has a motor mounting base, which is made of cast iron or welded steel plate. It is connected to the guide rail 22 via a slider, and its overall center of gravity is located within the center plane of the guide rail 22, ensuring smooth and unobstructed sliding. The transmission mechanism 24 preferably uses synchronous belt drive. One end of the rotating shaft 25 is a cantilever structure, used to mount the grinding wheel 26 and the locking element 27. When the drive motor 23 in the grinding head mechanism 2 is started, it drives the rotating shaft 25 to rotate at high speed through the transmission mechanism 24, and the grinding wheel 26 rotates at high speed along with the rotating shaft 25. The rotation direction of the grinding wheel 26 is opposite to the rotation direction of the screw 100, and the surface of the screw 100 is ground by the high-speed rotation of the grinding wheel 26. After the grinding wheel 26 rotates, the air pressure of the pressure regulating valve 28 is reduced, so that the weight of the load connected to the cylinder 21 is greater than the pulling force provided by the rod end of the cylinder 21. At this time, due to gravity, the load connected to the cylinder 21 descends along the guide rail 22, and the grinding wheel 26 contacts the screw 100 to begin grinding. During the grinding process, since the screw 100 actually has a screw groove, what needs to be ground is not a cylinder of equal diameter. When the grinding head mechanism 2 moves along the axial direction of the screw 100, the load connected to the cylinder 21 can move up and down adaptively with the guide rail 22 to adapt to the undulation of the screw groove.

[0033] In one embodiment, please refer to Figures 5 to 6 The rotating shaft 25 is provided with multiple grinding wheels 26, and spacers 261 are provided between adjacent grinding wheels 26. The rotating shaft 25 is provided with locking parts 27 for fixing the grinding wheels 26. The locking parts 27 are locking nuts with knurled handle patterns. The thread direction of the locking nuts is opposite to the rotation direction of the grinding wheels 26.

[0034] Specifically, two to six grinding wheels 26 can be installed on the rotating shaft 25, the exact number depending on the screw groove lead of the screw 100 and the grinding efficiency requirements. A spacer 261 is provided between adjacent grinding wheels 26. The spacer 261 is a cylindrical tube with an inner diameter that fits the rotating shaft 25 with a clearance, and an outer diameter smaller than that of the grinding wheel 26. Its thickness is designed according to the screw groove lead, allowing the grinding areas of multiple grinding wheels 26 to form continuous coverage or appropriate overlap, significantly improving grinding efficiency. The locking element 27 uses a locking nut with knurled straight or grid patterns on its outer surface for easy tightening with hand tools. The thread direction of the locking nut is opposite to the rotation direction of the grinding wheel 26: when the grinding wheel 26 rotates counterclockwise, the locking nut uses a right-hand thread; when the grinding wheel 26 rotates clockwise, the locking nut uses a left-hand thread. This design utilizes the self-locking principle of the thread; as the grinding wheel 26 rotates, the inertial torque causes the locking nut to tighten with each rotation, preventing loosening. When replacing the grinding wheel 26, simply rotate the locking nut in the opposite direction to quickly loosen it; no special wrench is needed, making it convenient for single-person operation.

[0035] Further, please refer to Figure 4 The power rotation mechanism 5 includes a rotation drive 51, an active rotation roller 52, a passive rotation roller 53, and a support base 54 fixedly mounted on the frame 1. The active rotation roller 52 is driven to rotate by the rotation drive 51. The active rotation roller 52 and the passive rotation roller 53 are arranged side by side and fixedly mounted on the support base 54. The screw 100 is placed on the active rotation roller 52 and the passive rotation roller 53.

[0036] Specifically, the rotary drive component 51 is a geared motor, connected to the shaft of the active rotary roller 52 via a coupling. The active rotary roller 52 and the passive rotary roller 53 have identical structures. The center distance between the active rotary roller 52 and the passive rotary roller 53 is designed according to the size of the screw 100, forming a V-shaped support angle. The screw 100 is placed on the two rollers, with its center of gravity located in the middle of the two rollers, ensuring stability and reliability. The support base 54 is rigidly fixed to the frame 1 by anchor bolts or welding, and the support base 54 is used to support the shafts of the active rotary roller 52 and the passive rotary roller 53. Preferably, the bearing housing has a self-aligning function to compensate for installation errors and ensure flexible rotation of the rollers. When the clamping roller 45 presses the adapter sleeve 101 from above, the adapter sleeve 101 is pressed between the active rotating roller 52, the passive rotating roller 53, and the clamping roller 45, with a clamping force N. A frictional force F = μ × N is generated between the adapter sleeve 101 and the active rotating roller 52. This torque drives the adapter sleeve 101 and the screw 100 to rotate as a whole. This friction drive method does not require centering and can work simply by placing it, adapting to different specifications of screws 100, and avoiding the problem of screw bending and deformation that may be caused by chuck clamping.

[0037] Further, please refer to Figure 3 The screw grinding device also includes a number of support rollers 6 for supporting the screw 100, and the number of support rollers 6 are spaced apart on the frame 1.

[0038] Specifically, the number of support rollers 6 is determined based on the maximum length of the screw 100, typically ranging from 3 to 8, and they are evenly spaced along the length of the frame 1 to form a multi-point support system. The support rollers 6 employ a roller structure. The top of the support rollers 6 is on the same horizontal plane as the top of the active rotating roller 52, ensuring the screw 100 remains horizontal. The support rollers 6 only provide support and do not participate in driving. When the screw 100 rotates, the support rollers 6 rotate passively, exhibiting low rolling resistance and not hindering the rotation of the screw 100. This effectively prevents the screw 100 from bending and deforming due to its own weight, ensuring the straightness of the screw 100 during grinding, avoiding localized over-grinding or under-grinding caused by bending, and ensuring consistent grinding quality across the entire screw 100.

[0039] In one embodiment, for a relatively long screw 100, a two-stage grinding process can be employed: first, one end of the screw 100 is ground clean, and then the screw 100 is turned around and clamped to grind the other end. This can significantly reduce the manufacturing cost and floor space required for the equipment.

[0040] 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.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A screw grinding device, characterized in that, include: A frame (1) is fixedly mounted with a grinding head moving mechanism (3), a pressing mechanism (4) and a power rotation mechanism (5); A screw (100) is rotatably mounted on the power rotation mechanism (5). The screw (100) includes a working end and a non-working end, and the shaft diameter of the non-working end is smaller than that of the working end. The grinding head mechanism (2) is slidably connected to the grinding head moving mechanism (3). The grinding head mechanism (2) includes a mounting plate, a grinding wheel (26) for grinding the screw (100), and a vertical moving component and a rotary driving component fixed on the mounting plate. The vertical moving component is connected to the rotary driving component and can drive the rotary driving component to move adaptively in the vertical direction. The rotary driving component is connected to the grinding wheel (26) and can drive the grinding wheel (26) to rotate around the axis. The pressing mechanism (4) includes a pressing component (41) and a pressing roller (45). The pressing component (41) is connected to the pressing roller (45). The pressing roller (45) adjusts its height through the pressing component to adapt to screws (100) of different diameters. The pressing roller (45) cooperates with the power rotation mechanism (5) to form a receiving cavity. The non-working end of the screw (100) is located in the receiving cavity. The non-working end of the screw (100) is fitted with an adapter sleeve (101). The adapter sleeve (101) has uniformly distributed set screws. The adapter sleeve (101) is connected to the screw (100) through the set screws to transmit torque. The pressing roller (45) is pressed onto the adapter sleeve (101). The screw (100) is driven to rotate by the frictional force between the pressing roller (45), the power rotation mechanism (5), and the adapter sleeve (101).

2. The screw grinding device as described in claim 1, characterized in that, The pressing mechanism (4) further includes a guide post (42) and a spring (43). The pressing assembly (41) includes a handwheel, a pressing screw (411) and a connecting plate. The pressing screw (411) is connected to the connecting plate. The pressing rubber roller (45) is installed at the lower end of the connecting plate. The spring (43) is sleeved on the guide post (42). The pressing rubber roller (45) is connected to the connecting plate through a floating hinge point (44).

3. The screw grinding device as described in claim 1, characterized in that, The rotation direction of the grinding wheel (26) is opposite to that of the screw (100).

4. The screw grinding device as described in claim 1, characterized in that, The vertical moving component includes a cylinder (21), one end of which is connected to the rotary drive component; the mounting plate has a guide rail (22), and the cylinder (21) drives the rotary drive component to slide on the guide rail (22).

5. The screw grinding device as described in claim 4, characterized in that, The cylinder (21) is connected to a cylinder stroke adjustment assembly (211), a pressure regulating valve (28) and a muffler. The cylinder stroke adjustment assembly (211) is adjusted to adapt to the grinding of screws (100) of different diameters.

6. The screw grinding device as described in claim 4, characterized in that, The rotary drive assembly includes a drive motor (23) slidably connected to the guide rail (22), a transmission mechanism (24), a rotating shaft (25), and a grinding wheel (26). The rotating shaft (25) is connected to the drive motor (23) via the transmission mechanism (24). The grinding wheel (26) is mounted on the rotating shaft (25) and rotates with the rotating shaft (25). The transmission mechanism (24) is a synchronous belt drive mechanism or a toothed chain drive mechanism.

7. The screw grinding device as described in claim 6, characterized in that, The rotating shaft (25) is provided with a plurality of grinding wheels (26), and spacers (261) are provided between adjacent grinding wheels (26); the rotating shaft (25) is provided with locking members (27) for fixing the grinding wheels (26), the locking members (27) are locking nuts, the locking nuts have knurled handle patterns, and the thread direction of the locking nuts is opposite to the rotation direction of the grinding wheels (26).

8. The screw grinding device as described in claim 1, characterized in that, The power rotation mechanism (5) includes a rotation drive (51), an active rotation roller (52), a passive rotation roller (53), and a support base (54) fixedly mounted on the frame (1). The active rotation roller (52) is driven to rotate by the rotation drive (51). The active rotation roller (52) and the passive rotation roller (53) are arranged side by side and fixedly mounted on the support base (54). The screw (100) is placed on the active rotation roller (52) and the passive rotation roller (53).

9. The screw grinding device as described in claim 1, characterized in that, It also includes a plurality of support rollers (6) for supporting the screw (100), the plurality of support rollers (6) being spaced apart on the frame (1).

10. The screw grinding device as described in claim 1, characterized in that, The frame (1) includes an upward-opening door (11), an upward-opening door drive mechanism (12), a dust collection box (13), and a cleaning port (14). The upward-opening door (11) is driven to open or close by the upward-opening door drive mechanism (12). The dust collection box (13) is located below the grinding area of ​​the screw (100). The cleaning port (14) is located on the side of the dust collection box (13) and is used to clean grinding debris.

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