Sole sample sampling device and sampling method

Abstract

The invention discloses a shoe sole sample sampling device and method. The shoe sole sample sampling device comprises a workbench, a conveying mechanism arranged on the workbench and a feeding and cutting mechanism arranged on the workbench, and the feeding and cutting mechanism comprises a rack, a feeding assembly arranged on the rack and a cutting assembly arranged on the rack; the feeding assembly and the cutting assembly are oppositely arranged, and the cutting assembly is used for automatically cutting shoe soles; the conveying mechanism comprises an extrusion assembly and a power assembly arranged on one side of the extrusion assembly. The power assembly is used for providing a power source for extrusion and transmission of materials with different sole thicknesses, and the extrusion assembly is used for extruding the soles with different thicknesses through adjustment; and molecular chains are separated in a freezing brittle state, so that the defects are overcome. Furthermore, the cutting force is kept perpendicular to the normal direction of the curved surface under closed-loop monitoring in the cutting mode, the layering risk is eliminated, meanwhile, the cutting speed is increased, the sampling time is saved, and energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of a shoe sole sample sampling device and sampling method, and more particularly to a shoe sole sample sampling device and sampling method. Background Technology

[0002] As a core functional component of footwear, the sole's physical and mechanical properties directly affect wearing comfort and durability. To ensure product reliability, sole materials need to undergo a series of standardized tests regularly, such as tensile strength and tear strength. Because soles are typically curved or multi-layered composite structures, and often feature non-uniform designs such as heel thickening, accurately obtaining flat samples that meet thickness requirements from finished soles presents significant technical challenges.

[0003] The traditional sample preparation method commonly used in the industry currently relies on operators holding the sole of a shoe and manually grinding it with a rotating grinding wheel. This process requires repeated positioning and judgment of the amount to be removed based on experience, which is not only extremely labor-intensive and inefficient, but also heavily influenced by human factors. During the operation, it is difficult to precisely control the contact pressure between the grinding wheel and the material, the grinding angle, and the time, which can easily lead to the thickness of the sample exceeding the target tolerance range after grinding, or the formation of excessively thin or unground areas, resulting in uneven thickness distribution.

[0004] Non-uniformity in specimen thickness severely interferes with subsequent physical property testing results. Taking tensile strength testing as an example, national standards (such as GB / T 3903.2) require specimens to be tested within specific thickness tolerances. Inconsistent thickness causes different parts of the same specimen to bear inconsistent loads, distorting stress distribution and leading to unpredictable fracture locations, increased data dispersion, and even spurious strength deviations. Furthermore, the non-repeatability of manual operation hinders the longitudinal comparability of test results and the implementation of standardization. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a shoe sole sample sampling device and sampling method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a shoe sole sample taking device, comprising: a worktable, a transmission mechanism disposed on the worktable, and a feeding and cutting mechanism disposed on the worktable.

[0007] The feeding and cutting mechanism includes a frame, a feeding component mounted on the frame, and a cutting component mounted on the frame; the feeding component and the cutting component are arranged opposite to each other, and the cutting component is used to automatically cut the shoe sole;

[0008] The transmission mechanism includes an extrusion assembly and a power assembly disposed on one side of the extrusion assembly; the power assembly is used to provide a power source for extruding and transmitting materials of different sole thicknesses, and the extrusion assembly is used to extrude materials of different sole thicknesses by adjusting the extrusion.

[0009] In a preferred embodiment of the present invention, the frame is H-shaped, the cutting component and the feeding component are symmetrically arranged on both sides of the middle crossbeam of the frame, and the extrusion component is arranged in the middle position of the frame.

[0010] In a preferred embodiment of the present invention, the cutting assembly includes a blade holder and a cutting tool disposed on the blade holder, the blade holder being fixedly connected to the frame.

[0011] In a preferred embodiment of the present invention, the tool holder is further provided with a first piezoelectric element and a capacitive displacement sensor; the displacement sensor is disposed on the front side of the tool to scan the height change of the sole surface in real time to generate a contour point cloud, and the first piezoelectric element is used to control the tool to vibrate parallel to the cutting edge, directly separating the material molecular chains and reducing lateral forces.

[0012] In a preferred embodiment of the present invention, the feeding assembly includes a feeding plate, the side of which coincides with the tangent of the extrusion assembly.

[0013] In a preferred embodiment of the present invention, the extrusion assembly includes an upper extrusion shaft, a lower extrusion shaft, and adjusting members respectively connected to both ends of the upper extrusion shaft; the upper extrusion shaft includes an inner shaft and an outer shaft, the two ends of the inner shaft are circular for overall rotation, the middle part is rectangular, and a second piezoelectric element is provided on the top for generating reverse micro-vibration during rotation to counteract the cutting reaction force; the upper extrusion shaft and the lower extrusion shaft have the same structure.

[0014] In a preferred embodiment of the present invention, the adjusting component includes a slider and a threaded rod. The slider is slidably connected to both sides of the frame, the bottom of the threaded rod is slidably connected to the slider, the middle part of the threaded rod is engaged with the frame, and a handwheel is fixedly connected to the top of the threaded rod.

[0015] In a preferred embodiment of the present invention, the power assembly includes a motor, a main synchronous pulley, and two auxiliary synchronous pulleys; the auxiliary synchronous pulleys are respectively fixedly connected to the motor and rotatably connected to the frame; there are two main synchronous pulleys arranged in a stacked manner; the main synchronous pulleys and auxiliary synchronous pulleys are connected and driven by a synchronous belt; a gear is fixedly connected to one side of the auxiliary synchronous pulleys on the frame, and a gear is fixedly connected to one end of the upper extrusion shaft and the lower extrusion shaft, and the three gears mesh in this manner.

[0016] A method for sampling shoe soles includes the following steps:

[0017] S1: The shoe sole sample is placed in liquid nitrogen for freezing, which is used to harden the material into a glassy state and eliminate viscoelasticity;

[0018] S2: The frozen shoe sole sample is conveyed to the cutter through the extrusion assembly, and the shoe sole sample is cut by the reciprocating vibration of the extrusion assembly and the cutter.

[0019] In a preferred embodiment of the present invention, in S1, the freezing time is 5-10 min; in S2, the vibration frequency is 100-200 kHz and the vibration amplitude is 1-5 μm.

[0020] This invention addresses the shortcomings of the prior art and has the following beneficial effects:

[0021] (1) This invention provides a shoe sole sample sampling device and method. A first piezoelectric element drives a cutting tool to vibrate at high frequency, with the vibration direction strictly parallel to the cutting edge, generating microscopic shear pulses. This concentrates high-frequency energy onto the glassy shoe sole material, causing the polymer chains to break directly without relying on continuous mechanical force. This significantly reduces cutting resistance, lateral force, and fiber stretching, avoiding deformation caused by thermal softening. Compared to existing technologies, this avoids the instability in sampling quality caused by material temperature rise or adhesion due to compression or friction in traditional shoe sole cutting methods. The separation of molecular chains under frozen brittle conditions compensates for this deficiency. Furthermore, the cutting method maintains the cutting force perpendicular to the surface normal under closed-loop monitoring, eliminating the risk of delamination, while simultaneously increasing cutting speed, saving sampling time, and reducing energy consumption.

[0022] (2) The present invention provides a shoe sole sample sampling device and sampling method. The inner and outer shafts slide together to generate reverse micro-vibration during rotation, which is opposite to the vibration of the cutter. The extrusion assembly can adjust the gap between the upper and lower extrusion shafts through the adjustment component. The second piezoelectric element is controlled by the system to generate reverse vibration, which is combined with the power component to counteract the cutting reaction force. The adjustment component rotates the threaded rod through the handwheel to move the slider up and down to adapt to different shoe sole thicknesses, realize stable material transmission, prevent sample displacement caused by vibration interference, and ensure continuous and uninterrupted cutting. Compared with the prior art, this design improves the versatility of the device and can handle various shoe sole sizes to be cut into thin slices. Combined with the liquid nitrogen freezing method to eliminate viscoelasticity, it enhances the reliability and service life of the system. Attached Figure Description

[0023] 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the material purchasing and cutting mechanism according to a preferred embodiment of the present invention;

[0026] In the diagram: 1. Workbench; 2. Transmission mechanism; 3. Feeding and cutting mechanism; 4. Frame; 5. Tool holder; 6. Tool; 7. Feeding plate; 8. Upper extrusion shaft; 9. Lower extrusion shaft; 10. Slider; 11. Threaded rod; 12. Handwheel; 13. Motor; 14. Main synchronous pulley; 15. Secondary synchronous pulley; 16. Synchronous belt. Detailed Implementation

[0027] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] As shown in the figure, a shoe sole sample taking device includes: a worktable, a conveying mechanism disposed on the worktable, and a feeding and cutting mechanism disposed on the worktable.

[0032] The feeding and cutting mechanism includes a frame, a feeding component mounted on the frame, and a cutting component mounted on the frame; the feeding component and the cutting component are arranged opposite to each other, and the cutting component is used to automatically cut the shoe sole;

[0033] The transmission mechanism includes an extrusion assembly and a power assembly disposed on one side of the extrusion assembly; the power assembly is used to provide a power source for extruding and transmitting materials of different sole thicknesses, and the extrusion assembly is used to extrude materials of different sole thicknesses by adjusting the extrusion.

[0034] It should be noted that the present invention provides a machine sampling method for a shoe sole sample sampling device. The shoe sole sample, which has been frozen and converted into a glassy state, is placed on a frame and conveyed by a compression component. During the conveying process, the sample reciprocates in a direction parallel to the cutting edge of the tool, and the tool also reciprocates. During the vibration, the compression component drives the shoe sole sample to vibrate, and the vibration direction of the compression component is opposite to that of the tool, thereby cutting the shoe sole sample.

[0035] The feeding and cutting mechanism includes a frame, a feeding component mounted on the frame, and a cutting component mounted on the frame; the feeding component and the cutting component are arranged opposite to each other, and the cutting component is used to automatically cut the shoe sole;

[0036] In this invention, the frame is H-shaped, with the cutting assembly and the feeding assembly symmetrically arranged on both sides of the central crossbeam of the frame, and the extrusion assembly located in the middle of the frame. The cutting assembly includes a blade holder and a blade mounted on the blade holder, which is fixedly connected to the frame. The blade holder also includes a first piezoelectric element and a capacitive displacement sensor; the displacement sensor is located on the front side of the blade to scan the height changes of the sole surface in real time to generate a contour point cloud, and the first piezoelectric element is used to control the blade to vibrate parallel to the cutting edge, directly separating the material molecular chains and reducing lateral forces. The feeding assembly includes a feeding plate, the side of which coincides with the tangent of the extrusion assembly.

[0037] It should be noted that the worktable is specifically a rectangular hollow platform. The feeding and cutting mechanism is located above the worktable, with the motor positioned in the hollow section. The frame is H-shaped, consisting of two symmetrical vertical plates and a horizontally arranged plate fixedly connected together. The horizontal plate is segmented, while the vertical plates are hollowed out. The blade holder is located on the horizontal plate. The feeding plate is rectangular and used to hold the frozen shoe sole sample. When the shoe sole sample, after being frozen and hardened by liquid nitrogen, enters the cutting area, a capacitive displacement sensor performs a high-speed scan of the frozen shoe sole surface at a sampling rate of 1000 times per second. The sensor emits a high-frequency electric field to measure the capacitance change between the shoe sole and the probe, capturing every subtle geometric feature in real time, such as the arch depression or forefoot warping. This data is instantly converted into a spatial coordinate point cloud, forming a dynamic digital surface model. This ensures that the scanning accuracy remains stable within ±0.1 micrometers at a low temperature of -160 degrees Celsius, avoiding errors caused by any condensation interference. This process provides a real-time topographic map for subsequent cutting, ensuring that the system can quickly respond to sudden changes in curvature.

[0038] The point cloud data generated by the sensor calculates key parameters to guide the cutting action. The sensor derives the local tangent angle θ, which may reach 15 degrees in the toe-turning area of ​​a shoe heel, defining the direction the tool needs to align. Simultaneously, the radius of curvature R is calculated using a three-point concyclic algorithm; for example, the R value at the base of the anti-slip stud is as low as 0.8 mm. These parameters not only reflect the surface geometry but are also directly input into adaptive formulas, such as the amplitude compensation ΔA = K · 1 / R (where K is the material coefficient, and 0.05 is used for EVA foam). Data processing is completed in milliseconds, ensuring that the tool posture dynamically matches the surface contour, laying the foundation for high-frequency vibration cutting and preventing uneven slicing or stress concentration caused by angular deviations.

[0039] Based on real-time calculated θ and R values, the first piezoelectric element begins multidimensional adjustments to control the tool for precise cutting. The piezoelectric ceramic stack operates in shear mode, first driving the tool holder to rotate so that the diamond tool's cutting edge is precisely parallel to angle θ, for example, twisting the tool by 12 degrees to conform to the normal direction of the arch of the foot. Simultaneously, the amplitude automatically adjusts according to the R value: maintaining a baseline amplitude of 1 micrometer in flat regions (R>50 mm), while increasing to 6.5 micrometers in high-curvature regions (e.g., R=0.8 mm) to compensate for material springback. The tool then vibrates at a high frequency of 100-200 kHz, with the vibration direction strictly parallel to the cutting edge, generating microscopic shear pulses. This mechanism acts directly on the material's molecular chains, achieving brittle fracture at low temperatures through cold cutting, rather than traditional extrusion methods, thereby reducing lateral forces and avoiding fiber stretching or thermal softening.

[0040] The core of the cutting process lies in the dynamic mechanism of high-frequency vibration interacting with the material. When the cutter contacts the frozen shoe sole in an adjusted posture, the high-frequency vibration energy is concentrated at the molecular level: hundreds of thousands of micro-shear pulses per second cause polymer chains (such as rubber or EVA foam) to break directly in the glassy state, rather than relying on continuous mechanical force. This direct separation of material molecular chains significantly reduces cutting resistance, while adaptive compensation of vibration amplitude ensures that the slice thickness uniformity is controlled within ±2 micrometers. For example, when cutting anti-slip studs on shoe soles, the system automatically reduces the feed rate to prevent overcutting, operates under closed-loop monitoring throughout the process, and ensures that the cutting force is always perpendicular to the surface normal, eliminating the risk of delamination.

[0041] The transmission mechanism includes an extrusion assembly and a power assembly disposed on one side of the extrusion assembly; the power assembly is used to provide a power source for extruding and transmitting materials of different sole thicknesses, and the extrusion assembly is used to extrude materials of different sole thicknesses by adjusting the extrusion.

[0042] In a preferred embodiment of the present invention, the extrusion assembly includes an upper extrusion shaft, a lower extrusion shaft, and adjusting members respectively connected to both ends of the upper extrusion shaft; the upper extrusion shaft includes an inner shaft and an outer shaft, the two ends of the inner shaft are circular for overall rotation, the middle part is rectangular, and a second piezoelectric element is provided on the top for generating reverse micro-vibration during rotation to counteract the cutting reaction force; the upper extrusion shaft and the lower extrusion shaft have the same structure.

[0043] In a preferred embodiment of the present invention, the adjusting component includes a slider and a threaded rod. The slider is slidably connected to both sides of the frame, the bottom of the threaded rod is slidably connected to the slider, the middle part of the threaded rod is engaged with the frame, and a handwheel is fixedly connected to the top of the threaded rod.

[0044] In a preferred embodiment of the present invention, the power assembly includes a motor, a main synchronous pulley, and two auxiliary synchronous pulleys; the auxiliary synchronous pulleys are respectively fixedly connected to the motor and rotatably connected to the frame; there are two main synchronous pulleys arranged in a stacked manner; the main synchronous pulleys and auxiliary synchronous pulleys are connected and driven by a synchronous belt; a gear is fixedly connected to one side of the auxiliary synchronous pulleys on the frame, and a gear is fixedly connected to one end of the upper extrusion shaft and the lower extrusion shaft, and the three gears mesh in this manner.

[0045] It should be noted that the motor is fixedly connected to the inner side of the bottom of the worktable, the main synchronous pulley is rotatably connected to the worktable plane, and one of the two auxiliary synchronous pulleys is fixedly connected to the motor, while the other is rotatably connected to the frame. The main synchronous pulley is composed of two stacked synchronous pulleys, and each of the two main synchronous pulleys and the two auxiliary synchronous pulleys is located in the same vertical plane. The main synchronous pulley and the auxiliary synchronous pulleys are connected by a synchronous belt. Thus, during the rotation of the motor, all synchronous pulleys are synchronously driven to rotate through the synchronous belt. Gears are fixedly connected to the side of the auxiliary synchronous pulley rotatably connected to the frame. The straight plate that makes up the frame is hollowed out, and the slider is slidably connected to the hollowed-out part. A threaded rod is slidably connected to the top of the slider, and the threaded rod meshes with the straight plate of the frame. A handwheel is fixedly connected to the top of the threaded rod. The upper extrusion shaft is rotatably connected to the slider, and the lower extrusion shaft is rotatably connected to the frame. By rotating the handwheel, the threaded rod is rotated, which in turn drives the slider to move up and down on the frame, thereby adjusting the gap between the upper and lower extrusion shafts. Gears are fixedly connected to one end of the upper and lower extrusion shafts, and the gears on the upper extrusion shaft, the lower extrusion shaft, and the auxiliary synchronous pulley are arranged in a meshing manner. The gears on the upper and lower extrusion shafts do not disengage during the up and down movement of the upper extrusion shaft.

[0046] The upper extrusion shaft and the lower extrusion shaft have the same structure. The upper extrusion shaft includes an inner shaft and an outer shaft. The two ends of the inner shaft are cylindrical and rotatably connected to the frame. The middle part is rectangular and hollow. The inner shaft and the outer shaft can be sleeved together, and the sleeve between the two is a sliding connection. Therefore, during rotation, the outer shaft can slide in a direction parallel to the cutting edge of the tool. The sliding of the outer shaft is controlled by a second piezoelectric element set on the inner shaft. The working principle of the second piezoelectric element is the same as that of the first piezoelectric element. The two are controlled by the same system and are set in opposite directions of vibration.

[0047] A method for sampling shoe soles involves freezing the shoe sole sample in liquid nitrogen to harden the material into a glassy state for 8 minutes, thereby eliminating viscoelasticity. The frozen shoe sole sample is then conveyed to a cutting tool via an extrusion assembly. The shoe sole sample is cut by reciprocating vibration between the extrusion assembly and the cutting tool at a vibration frequency of 150 kHz and a vibration amplitude of 3 μm.

[0048] Based on the preferred embodiments of the present invention described above, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A shoe sole sample taking device, comprising: A workbench, a transmission mechanism disposed on the workbench, and a feeding and cutting mechanism disposed on the workbench, characterized in that, The feeding and cutting mechanism includes a frame, a feeding component disposed on the frame, and a cutting component disposed on the frame; the feeding component and the cutting component are disposed opposite to each other, and the cutting component is used to automatically cut the shoe sole; The transmission mechanism includes an extrusion assembly and a power assembly disposed on one side of the extrusion assembly; the power assembly is used to provide a power source for extruding and transmitting materials of different sole thicknesses, and the extrusion assembly is used to extrude materials of different sole thicknesses by adjusting the extrusion.

2. The shoe sole sample taking device according to claim 1, characterized in that: The frame is H-shaped, the cutting assembly and the feeding assembly are symmetrically arranged on both sides of the middle crossbeam of the frame, and the extrusion assembly is located in the middle of the frame.

3. The shoe sole sample taking device according to claim 1, characterized in that: The cutting assembly includes a tool holder and a cutting tool disposed on the tool holder, the tool holder being fixedly connected to the frame.

4. The shoe sole sample taking device according to claim 3, characterized in that: The tool holder is also equipped with a first piezoelectric element and a capacitive displacement sensor; the displacement sensor is located on the front side of the tool to scan the height change of the sole surface in real time to generate a contour point cloud, and the first piezoelectric element is used to control the tool to vibrate parallel to the cutting edge, directly separating the material molecular chains and reducing lateral forces.

5. A shoe sole sample taking device according to claim 1, characterized in that: The feeding assembly includes a feeding plate, the side of which coincides with the tangent of the extrusion assembly.

6. The shoe sole sample taking device according to claim 1, characterized in that: The extrusion assembly includes an upper extrusion shaft, a lower extrusion shaft, and adjusting components connected to both ends of the upper extrusion shaft. The upper extrusion shaft includes an inner shaft and an outer shaft. The two ends of the inner shaft are circular for overall rotation, and the middle part is rectangular. A second piezoelectric element is provided on the top to generate reverse micro-vibration during rotation to counteract the cutting reaction force. The upper extrusion shaft has the same structure as the lower extrusion shaft.

7. A shoe sole sample taking device according to claim 1, characterized in that: The adjusting component includes a slider and a threaded rod. The slider is slidably connected to both sides of the frame. The bottom of the threaded rod is slidably connected to the slider. The middle part of the threaded rod is engaged with the frame. A handwheel is fixedly connected to the top of the threaded rod.

8. A shoe sole sample taking device according to claim 1, characterized in that: The power assembly includes a motor, a main synchronous pulley, and two auxiliary synchronous pulleys. The auxiliary synchronous pulleys are fixedly connected to the motor and rotatably connected to the frame. There are two main synchronous pulleys stacked together. The main synchronous pulleys and the auxiliary synchronous pulleys are connected and driven by a synchronous belt. A gear is fixedly connected to one side of the auxiliary synchronous pulleys on the frame, and gears are fixedly connected to one end of both the upper extrusion shaft and the lower extrusion shaft. The three gears mesh in this manner.

9. A method for sampling shoe soles, based on the sampling device according to any one of claims 1-8, characterized in that: Includes the following steps S1: The shoe sole sample is placed in liquid nitrogen for freezing, which is used to harden the material into a glassy state and eliminate viscoelasticity; S2: The frozen shoe sole sample is conveyed to the cutter through the extrusion assembly, and the shoe sole sample is cut by the reciprocating vibration of the extrusion assembly and the cutter.

10. A method for sampling shoe soles according to claim 9, characterized in that: In S1, the freezing time is 5-10 min; in S2, the vibration frequency is 100-200 kHz and the vibration amplitude is 1-5 μm.

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