An ice track racing snowmobile ice skate blade bottom edge profiling device and method

Abstract

The application relates to a polishing device and a polishing method for the bottom edge of an ice track racing snowmobile ice skate, which comprises a handle, a base, a clamping plate and a quick-change pad plate. The polishing device is used to clamp sandpaper and cotton cloth blocks respectively to perform rough polishing, semi-fine polishing, fine polishing and grinding polishing by attaching abrasive paste, so that the surface roughness of the circular arc surface meets the competition requirements; when the polishing device is used for manual polishing, according to the cutting allowance, the arc size and the material hardness of the bottom edge of the ice skate and other factors, the quick-change pad plate of the polishing device with different arc sizes and different soft and hard materials is replaced, so that the sandpaper and the abrasive paste can better adhere to the circular arc surface of the bottom edge of the ice skate, and the surface roughness and the geometric size precision of the circular arc surface of the bottom edge of the ice skate can meet the requirements at the same time; without customizing large polishing tool equipment, the manufacturing precision of small-batch racing snowmobile ice skates can be ensured through the manual polishing method, and the tool requirements for the later maintenance and maintenance of the ice skate can be met.

Description

Technical Field

[0001] This invention belongs to the field of racing bobsleigh technology, specifically relating to a conformal polishing device and polishing method for the bottom edge of ice blades on ice racing bobsleigh tracks. Background Technology

[0002] Bobsleigh racing, also known as bobsleigh, is a major sport in the Winter Olympics. Bobsleighs have two sets of independent gliding blades at the bottom, commonly called "ice skates." These blades are made from a special alloy steel (imported material) with properties similar to martensitic stainless steel (2Cr). 13 The material must be Ni2 and approved by the International Bobsleigh and Skeleton Federation (IBSF), with laser-etched anti-counterfeiting markings. No heat treatment, chemical treatment, or other processes that alter the shape of the ice skate are permitted during machining and bottom edge polishing; processing and polishing can only be done by removing material. Simultaneously, the dimensional accuracy and surface roughness of the curved bottom edge must be guaranteed to improve the bobsleigh's gliding speed on ice.

[0003] The aforementioned ice skates and their materials are being processed for the first time in China. Due to the high toughness of stainless steel, the surface roughness of the bottom edge profile after CNC machining is poor. The step-by-step cutting method used for machining the arc shape produces step marks, with the largest protrusion reaching 0.2mm. Furthermore, the arc-shaped bottom edge is formed in two stages, resulting in uneven polishing allowance and shape misalignment on the arc surface. The surface accuracy severely impacts the polishing process, and currently, there is no suitable polishing equipment or method that can simultaneously guarantee the dimensional accuracy (surface profile and line profile) and surface roughness requirements of the arc surface. Summary of the Invention

[0004] The purpose of this invention is to provide a stainless steel, arc-shaped ice blade bottom edge polishing device for ice racing bobsleighs, and a polishing method to solve the problem that the surface roughness and geometry of the arc-shaped surface cannot be guaranteed at the same time during the polishing process of special stainless steel arc-shaped surfaces.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A conformal polishing device for the bottom edge of ice car blades used in ice racing tracks mainly consists of a handle 1, a base 3, two clamping plates 4, and a quick-change pad 6.

[0007] The handle 1 is located above the base 3 and is an integral structure therewith. The quick-change pad 6 is installed below the base 3 and is fixed by two limiting bolts 2. The two clamping plates 4 are located on the left and right sides of the base 3 in the width direction. Each clamping plate 4 is fixed to the base 3 by a set of clamping bolts 5. The clamping bolts 5 and the clamping plates 4 are used in combination. By adjusting the clamping bolts 5, the clamping plates 4 press the cutting medium onto the sides of the base 3 and the quick-change pad 6 respectively.

[0008] Furthermore, the handle 1 is oval-shaped with a long tail, which is adapted to be gripped tightly by the operator and to apply pushing and pressure.

[0009] Furthermore, the bottom of the base 3 is a dovetail-shaped groove, which facilitates the replacement of the quick-change pad 6 as needed. The top of the base 3 is provided with two countersunk holes for the installation of the limit bolt 2 and to be hidden on the top surface of the base 3. The top of the quick-change pad 6 is a dovetail-shaped punch structure, which is in clearance fit with the dovetail-shaped groove of the base 3. The bottom of the quick-change pad 6 is provided with a semi-circular arc-shaped groove along the length of the outer shape.

[0010] Furthermore, the quick-change pad 6 is made of aluminum, plastic, nylon, wood, and high-density foam, and the arc size of the through groove can be processed according to the arc size of the bottom edge of the ice skate to be processed; the cutting medium includes aluminum, plastic, nylon, wood, and high-density foam.

[0011] A conformal polishing method for the bottom edge of ice skates used in ice racing tracks includes the following steps:

[0012] A. Perform full-dimensional inspection on the CNC-machined ice skate blank, and collect the arc dimension, surface profile, line profile, surface roughness, step pitch texture depth, and polishing allowance of the bottom edge of the ice skate.

[0013] B. Perform rough polishing based on the data detected in step A;

[0014] C. Perform a second full-size inspection on the ice skate after rough polishing, and collect the arc dimension, surface profile, line profile, surface roughness and polishing allowance of the bottom edge after rough polishing. By comparing the data from the first and second inspections and the number of rough polishing cycles, calculate the cutting amount of the initial sandpaper for each polishing step.

[0015] D. Based on the test data, perform localized trimming and polishing, and then perform semi-finished polishing in sequence;

[0016] E. During the polishing process, the remaining amount is simultaneously detected and fine polishing is carried out in sequence.

[0017] F. Perform a third full-size inspection on the finely polished ice skate, and collect the arc dimension, surface profile, line profile, and surface roughness of the bottom edge after fine polishing. The overall profile and arc dimension of the finely polished ice skate should meet the technical requirements. The remaining micro-polishing allowance is 0.001-0.003mm, and the surface roughness value should reach 0.4.

[0018] G. Based on the test data, perform local finishing and fine polishing, followed by sequential grinding and polishing.

[0019] Further, in step A, select appropriate grit sandpaper based on the pitch texture and surface roughness, and adjust the grit of sandpaper appropriately with reference to the machining allowance. Confirm the arc size of the polishing device base 3 based on the arc size and the selected sandpaper thickness.

[0020] Further, step B specifically includes the following steps:

[0021] B1. After determining the initial sandpaper grit and the arc size of the base, install the quick-change pad 6 on the base 3, and fix the sandpaper by clamping the bolts 5 with two sets of clamping plates 4. Place the polishing device and the sandpaper in the same direction as the bottom edge of the ice skate to be polished, and operate the polishing device to polish quickly and back and forth along the length of the ice skate. Use the cutting action of the sandpaper to perform the first-order rough polishing on the surface of the bottom edge of the ice skate.

[0022] B2. Replace the sandpaper with 600 grit and 800 grit respectively, and repeat the first step of rough polishing to perform the second and third steps of rough polishing. The depth of the raised and recessed points of the bottom edge profile pattern gradually decreases until there are no visible pattern. When changing the sandpaper, replace the quick-change pad 6 according to its thickness.

[0023] Further, step D specifically includes the following steps:

[0024] D1. Based on the second full-size inspection data, identify the abnormal locations of the bottom edge profile, polishing allowance, and surface roughness. Use the third step of rough polishing to locally polish the abnormal locations. During local polishing, control the polishing pressure to be lower than the normal value. Simultaneously use a micrometer to check and adjust the local polishing allowance until it reaches the overall average value. Use a comparison method to improve the surface roughness of the abnormal parts to the overall level. For the abnormal profile parts, use the bottom plane of the quick-change pad of the polishing device to adjust the part using a motion trajectory-following polishing technique. Use an R gauge to check until the overall bottom edge standard is met.

[0025] D2. After repairing the abnormal parts in the rough polishing, the same operation steps as rough polishing are used. The grit of sandpaper is adjusted to 1000 grit, 1200 grit, 1500 grit and 2000 grit in sequence for semi-fine polishing. During semi-fine polishing, as the grit of sandpaper increases and the contact area increases, the pressure applied to the polishing device is appropriately increased. At the same time, in each step of semi-fine polishing, the polishing allowance is measured with a micrometer, the surface roughness standard plate is compared, and the bottom edge arc shape is measured with an R gauge.

[0026] Further, step E specifically includes the following steps:

[0027] E1. Perform process inspection on the bottom edge of the ice skate after semi-finish polishing. Use a micrometer to further measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge. Mark and record abnormal parts. Use the fourth step of semi-finish polishing to perform local polishing treatment on the abnormal parts. During the local fine polishing process, control the polishing pressure to be lower than the normal value.

[0028] E2. After local repairs, repeat the semi-finish polishing steps, adjusting the sandpaper grit to 2500, 3000, 3500, and 5000 in sequence for fine polishing in four stages. During fine polishing, increase the pressure applied to the polishing device appropriately as the sandpaper grit increases, and promptly clean any residual sand particles and iron filings from the sandpaper surface. In each stage of fine polishing, use a micrometer to measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the bottom edge arc shape.

[0029] Further, step G specifically includes the following steps:

[0030] G1. Based on the third full-size inspection data, identify the abnormal surface roughness of the bottom edge. Use the fourth step of fine polishing to locally repair and polish the abnormal locations. During the local polishing process, control the polishing pressure to be lower than the normal value, and use the comparison method to repair and improve the surface roughness of the abnormal parts to the overall level.

[0031] G2. After local repairs, replace the quick-change pad of the polishing device to ensure that the inner arc groove of the quick-change pad completely presses the polishing cotton cloth tightly against the arc surface of the bottom blade. Apply stainless steel polishing paste evenly to the cotton cloth and polish smoothly along the length of the ice skate. During the process, control the polishing pressure to be uniform and use a reciprocating speed higher than that of the fine polishing operation.

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

[0033] This invention employs a manual mechanical polishing method. A polishing device holds sandpaper and a cotton cloth with abrasive paste, performing rough polishing, semi-fine polishing, fine polishing, and final polishing in sequence. This ensures the arc-shaped surface meets the surface roughness requirements for competition. During manual polishing, the device utilizes quick-change pads of different arc sizes and materials (soft and hard) to better conform the sandpaper and abrasive paste to the arc-shaped surface of the blade, based on factors such as the cutting allowance, arc size, and material hardness. This ensures both the surface roughness and geometric accuracy of the hand-polished arc-shaped surface of the blade meet the requirements. This method eliminates the need for customized large-scale polishing equipment, allowing for the maintenance and tooling needs of small-batch racing bobsleigh blades to be met through manual polishing. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of the conformal polishing device of the present invention;

[0036] Figure 2 This is a schematic diagram of the conformal polishing device assembly structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the actual application structure of the conformal polishing device of the present invention;

[0038] Figure 4 This is a flowchart illustrating the implementation of the polishing method of the present invention, which simultaneously controls surface accuracy and roughness.

[0039] In the diagram: 1. Handle; 2. Limiting bolt; 3. Base; 4. Clamping plate; 5. Pressing bolt; 6. Quick-change pad. Detailed Implementation

[0040] The present invention will be further described below with reference to embodiments:

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0042] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] like Figures 1-3 As shown, the conformal polishing device for the bottom edge of the ice car blade for ice racing track of the present invention consists of a handle 1, two limiting bolts 2, a base 3, two clamping plates 4, two sets of clamping bolts 5 and a quick-change pad 6.

[0044] The handle 1 is located above the base 3 and is an integral part of the base 3. The quick-change pad 6 is installed below the base 3 via a dovetail structure, and the quick-change pad 6 and the base 3 are also secured to each other by two limiting bolts 2 located on the front and rear sides of the handle 1. By controlling the limiting bolts 2, the quick-change pad 6 can be replaced as needed and fixed to the base 3. The clamping plates 4 are located on the left and right sides of the base 3, and each clamping plate 4 is fixed to the base 3 by a set of two clamping bolts 5. The two sets of clamping bolts 5 act on the clamping plates 4, clamping sandpaper or cotton cloth at both ends of the base 3 and the quick-change pad 6, fixing them to the polishing device as a whole. At the same time, by changing the sandpaper or cotton cloth as needed, the conformal polishing device and polishing media as a whole can be manually operated to polish the bottom edge of the ice skate.

[0045] Specifically, the bottom of the base 3 has a dovetail-shaped groove to facilitate the replacement of the quick-change pad 6 as needed, and the top of the base 3 is provided with two countersunk holes for the installation of the limit bolts 2 and to be hidden in the top surface of the base 3.

[0046] The contour handle 1, located at the top of the device, is used for hand-held operation of the contour polishing device. The handle 1 is oval-shaped with a long tail, designed to fit the operator's hand to grip and apply pushing and pressure.

[0047] The quick-change pad 6 has a dovetail-shaped punch structure at the top, which fits into the dovetail-shaped groove of the base 3 with a clearance, allowing both to slide freely for on-demand replacement. Its bottom has a semi-circular groove along its length, available in various sizes. The quick-change pad 6 offers multiple material and arc dimensions, including aluminum, plastic, nylon, wood, and high-density foam. The arc dimension of the through groove can be customized to the arc shape of the ice skate blade's bottom edge to ensure better contact between the cutting medium and the blade's shape during polishing.

[0048] The clamping bolt 5 and the clamping plate 4 are used together and are respectively set on two sides of the base 3 in the width direction. By adjusting the clamping bolt 5, the clamping plate 4 presses the cutting medium onto the sides of the base 3 and the quick-change pad 6 respectively. During operation, the cutting medium and the polishing device are integrated to perform polishing operation on the bottom edge of the ice skate to be polished.

[0049] This invention discloses a conformal polishing method for the bottom edge of ice car racing blades on ice tracks. Using the aforementioned conformal polishing device, the inner arc structure of the quick-change pad 6 of the polishing device ensures full contact with the arc-shaped surface of the bottom edge of the blade during polishing, avoiding problems such as localized cutting or uneven polishing allowance, thereby guaranteeing the dimensional accuracy of the arc-shaped surface. Simultaneously, during polishing, bases with different inner arc dimensions are replaced as needed based on the thickness of the cutting medium, ensuring full contact between the cutting medium and the bottom edge of the blade. The uniformity of the polishing allowance is controlled through multiple coordinate measuring machines and auxiliary measurements during the process, and localized finishing techniques are used to improve the surface profile of the blade along its length. Specifically, the method includes the following steps:

[0050] Step S10: Perform full-dimensional inspection on the CNC-machined ice skate blank, mainly collecting the arc dimension, surface profile, line profile, surface roughness, step pitch texture depth, and polishing allowance of the bottom edge of the ice skate.

[0051] Step S11: Select appropriate grit sandpaper based on the pitch texture and surface roughness, and adjust the grit sandpaper appropriately with reference to the machining allowance; confirm the arc size of the quick-change pad of the polishing device based on the arc size and the selected sandpaper thickness.

[0052] Step S20: After determining the initial sandpaper grit and the arc size of the quick-change pad 6, install the quick-change pad 6 on the base 3, fix the sandpaper with two sets of clamping plates 4 and clamping bolts 5, place the polishing device and sandpaper in the same direction as the bottom edge of the ice skate to be polished, operate the polishing device to polish quickly and reciprocally along the length of the ice skate, and use the cutting action of the sandpaper to perform the first-order rough polishing on the surface of the bottom edge of the ice skate.

[0053] Step S21: Replace the sandpaper with 600 grit and 800 grit respectively, and repeat the first step of rough polishing to perform the second and third steps of rough polishing. The step pattern on the bottom edge surface is gradually reduced until there is no visible step pattern. When changing the sandpaper, replace the quick-change pad 6 according to its thickness to ensure that the inner arc groove of the quick-change pad 6 presses the sandpaper tightly against the arc surface of the bottom edge.

[0054] Step S30: Perform a second full-size inspection on the ice skate after rough polishing. This mainly involves collecting the bottom edge arc dimension, surface profile, line profile, surface roughness, and polishing allowance after rough polishing. By comparing the data from the first and second inspections and the number of rough polishing cycles, calculate the cutting amount of the initial sandpaper for each polishing step. This will provide data reference for selecting the sandpaper grit and the number of polishing cycles in the subsequent semi-finishing and finishing polishing processes.

[0055] Step S40: Based on the second full-size inspection data, identify the abnormal locations of the bottom edge profile, polishing allowance, and surface roughness. Use the third-order coarse polishing step to locally polish the abnormal locations. During local polishing, control the polishing pressure to be lower than the normal value. Simultaneously use a micrometer to inspect and adjust the local polishing allowance until it reaches the overall average value. Use a comparison method to improve the surface roughness of the abnormal parts to the overall level. For the abnormal profile parts, use the bottom plane of the quick-change pad 6 of the polishing device to adjust the part using a motion trajectory-following polishing technique. Use an R gauge to inspect until the overall bottom edge standard is met.

[0056] Step S41: After repairing the abnormal parts in the rough polishing, the same operation steps as rough polishing are used. The grit of sandpaper is adjusted to 1000 grit, 1200 grit, 1500 grit and 2000 grit in sequence for semi-finish polishing. During semi-finish polishing, the pressure applied to the polishing device is appropriately reduced as the grit of sandpaper is increased. At the same time, in each step of semi-finish polishing, the polishing allowance is measured with a micrometer, the surface roughness standard plate is compared, and the bottom edge arc shape is measured with an R gauge. The aim is to control the overall arc surface contour, polishing allowance and surface roughness to be consistent.

[0057] Step S50: Perform process inspection on the semi-finished ice skate bottom edge, use a micrometer to further measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge. Mark and record abnormal parts, and use the fourth step of semi-finished polishing to perform local polishing treatment on the detected abnormal positions. During the local fine polishing process, control the polishing pressure to be lower than the normal value.

[0058] Step S51: After local repair, repeat the semi-finish polishing operation. Adjust the sandpaper grit to 2500, 3000, 3500, and 5000 grit in sequence for fine polishing. During fine polishing, reduce the pressure applied to the polishing device appropriately as the sandpaper grit increases. As the surface roughness of the bottom edge gradually increases, clean the sandpaper surface of any residual sand particles and iron filings in time to prevent them from mixing into powder and scratching the bottom edge surface again. At the same time, in each step of fine polishing, use a micrometer to measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge to further improve the overall arc surface contour and surface roughness.

[0059] Step S60: Perform a third full-size inspection on the finely polished ice skate. The main data collected are the arc size, surface profile, line profile, and surface roughness of the bottom edge after fine polishing. The overall profile and arc size of the finely polished ice skate should meet the technical requirements. The remaining micro-polishing allowance is about 0.001-0.003mm, and the surface roughness value should reach about 0.4.

[0060] Step S70: Based on the third full-size inspection data, identify the abnormal surface roughness of the bottom edge. Use the fourth step of fine polishing to locally repair and polish the abnormal parts. During the local polishing process, control the polishing pressure to be lower than the normal value, and use the comparison method to repair and improve the surface roughness of the abnormal parts to the overall level.

[0061] Step S71: After local repairs, replace the quick-change pad 6 of the polishing device to ensure that the inner arc groove of the quick-change pad 6 completely presses the polishing cotton cloth tightly against the arc-shaped surface of the bottom edge. Apply stainless steel polishing paste evenly to the cotton cloth and polish smoothly along the length of the ice skate. During the process, control the polishing pressure evenly and use a reciprocating speed higher than that of fine polishing to facilitate full contact between the polishing paste and the bottom edge of the ice skate and exert a physical polishing effect, which helps to improve the surface roughness and gloss of the bottom edge of the ice skate.

[0062] Furthermore, in steps S10, S30, and S60, full-size inspection is the key to controlling the contour, arc accuracy, and surface roughness of the ice skate blade bottom edge.

[0063] Furthermore, in steps S11, S21, S41, and S51, the quick-change pad 6 of the corresponding specification is replaced simultaneously with the sandpaper during the rough polishing, semi-fine polishing, and fine polishing processes. This is the key to ensuring the dimensional accuracy of the bottom edge arc surface contour.

[0064] Furthermore, in steps S11, S21, S41, and S51, as the surface roughness of the bottom edge gradually increases, it is necessary to clean the sand particles and iron filings remaining on the sandpaper surface in a timely manner and replace the sandpaper with new sandpaper in a timely manner. This is the key to gradually improving the surface roughness of the arc-shaped surface. Example

[0065] This embodiment uses a dedicated polishing device to polish the bottom edge of the ice skate. The inner arc structure of the quick-change pad 6 of the polishing device acts in full contact with the arc-shaped surface during the polishing process, avoiding problems such as local cutting or uneven polishing allowance, thereby ensuring the dimensional accuracy of the arc-shaped surface. At the same time, the base 3 with different inner arc sizes is changed at any time according to the different thicknesses of the polishing medium during the polishing process, so as to ensure full contact between the polishing medium and the bottom edge of the ice skate. The uniformity of polishing allowance is controlled by multiple three-coordinate detection and auxiliary measurement during the process, and the surface profile of the ice skate in the long dimension is improved by local trimming.

[0066] The technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0067] Step S10: Perform full-dimensional inspection on the CNC-machined ice skate blank, mainly collecting the arc dimension, surface profile, line profile, surface roughness, step pitch texture depth, and polishing allowance of the bottom edge of the ice skate.

[0068] Step S11: Select appropriate grit sandpaper based on the step pitch, texture, and surface roughness. When the texture depth is about 0.1-0.2mm and the surface roughness value is between 1.6-3.2, initially select 400 grit sandpaper to polish the texture protrusions on the surface. At the same time, adjust the grit of the sandpaper appropriately with reference to the machining allowance. Confirm the arc size of the polishing device base 3 based on the arc size and the selected sandpaper thickness.

[0069] Step S20: After determining the initial sandpaper grit and the arc dimension of the base 3, install the quick-change pad 6 onto the base 3 using a dovetail structure and fix it with the limiting screw 2. Secure the sandpaper, slightly larger than the bottom surface of the quick-change pad 6, to the quick-change pad 6 by installing two sets of clamping plates 4 and clamping bolts 5. Place the polishing device and sandpaper together in the same direction as the inner arc groove of the quick-change pad 6 and the bottom edge of the ice skate to be polished. Adjust the clamping bolts 5 appropriately so that the sandpaper completely fits the bottom edge of the ice skate to be polished. Apply downward pressure through the handle 1, and simultaneously operate the polishing device to polish quickly and reciprocally along the length of the ice skate, recording the number of reciprocations. During the process, control the consistency of the pressure applied to the polishing device. At the same time, adjust the clamping bolts 5 according to the wear degree of the sandpaper to laterally change or replace the sandpaper. Use the cutting action of the sandpaper to perform the first-order rough polishing on the surface of the bottom edge of the ice skate, so that the depth of the raised and recessed points of the step pattern is less than 0.05-0.08mm.

[0070] Step S21: Replace the sandpaper with 600 grit and 800 grit respectively, and repeat the first step of rough polishing to perform the second and third steps of rough polishing. The depth of the raised and recessed points of the bottom edge profile pattern gradually decreases from 0.05mm to the point where there are no visible raised and recessed points. When changing the sandpaper, replace the quick-change pad 6 according to its thickness to ensure that the inner arc groove of the quick-change pad 6 presses the sandpaper tightly against the bottom edge arc profile.

[0071] Step S30: Perform a second full-size inspection on the ice skate after rough polishing. This mainly involves collecting the arc dimension, surface profile, line profile, surface roughness, and polishing allowance of the bottom edge after rough polishing. By comparing the data from the first and second inspections and the number of rough polishing cycles, calculate the cutting amount of the initial sandpaper for each polishing step. This will provide data reference for selecting the sandpaper grit and the number of polishing cycles in the subsequent semi-finish polishing and fine polishing processes.

[0072] Step S40: Based on the second full-size inspection data, identify the abnormal locations of the bottom edge profile, polishing allowance, and surface roughness. Use the third-order coarse polishing step to perform local polishing on the abnormal areas. During local polishing, control the polishing pressure to be lower than the normal value. Simultaneously use a micrometer to inspect and adjust the local polishing allowance until it reaches the overall average value. Use a comparison method to improve the surface roughness of the abnormal areas to the overall level. For the abnormal profile areas, use the bottom plane of the quick-change pad 6 of the polishing device to adjust it using a motion trajectory-following polishing technique. Use an R gauge for inspection until the overall bottom edge standard is met.

[0073] After repairing the abnormal parts in the rough polishing in step S41, the same operation steps as rough polishing are used. The grit of sandpaper is adjusted to 1000 grit, 1200 grit, 1500 grit and 2000 grit in sequence for semi-fine polishing in four stages. During the semi-fine polishing process, as the grit of sandpaper increases and the contact area increases, the pressure applied to the polishing device is appropriately reduced. At the same time, in each stage of semi-fine polishing, a micrometer is used to measure the polishing allowance, a surface roughness standard plate is used for comparison, and an R gauge is used to measure the bottom edge arc shape. The aim is to control the overall arc surface contour, polishing allowance and surface roughness to be consistent.

[0074] Step S50: Perform process inspection on the semi-finished ice skate bottom edge, use a micrometer to further measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge. Mark and record abnormal parts, and use the fourth step of semi-finished polishing to perform local polishing treatment on the detected abnormal positions. During the local fine polishing process, control the polishing pressure to be lower than the normal value.

[0075] Step S51: After local repair, repeat the semi-finish polishing operation. Adjust the sandpaper grit to 2500, 3000, 3500, and 5000 grit in sequence for fine polishing. During fine polishing, reduce the pressure applied to the polishing device appropriately as the sandpaper grit increases. As the surface roughness of the bottom edge gradually increases, clean the sandpaper surface of any residual sand particles and iron filings in time to prevent them from mixing into powder and scratching the bottom edge surface again. At the same time, in each step of fine polishing, use a micrometer to measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge to further improve the overall arc surface contour and surface roughness.

[0076] Step S60: Perform a third full-size inspection on the finely polished ice skate. The main data collected are the arc size, surface profile, line profile, and surface roughness of the bottom edge after fine polishing. The overall profile and arc size of the finely polished ice skate should meet the technical requirements. The remaining micro-polishing allowance is about 0.001-0.003mm, and the surface roughness value should reach about 0.4.

[0077] Step S70: Based on the third full-size inspection data, identify the abnormal surface roughness of the bottom edge. Use the fourth step of fine polishing to locally repair and polish the abnormal location. During the local polishing process, control the polishing pressure to be lower than the normal value, and use the comparison method to repair and improve the surface roughness of the abnormal part to the overall level.

[0078] Step S71: After local repairs, replace the quick-change pad 6 of the polishing device to ensure that the inner arc groove of the quick-change pad 6 completely presses the polishing cotton cloth tightly against the arc-shaped surface of the bottom edge. Apply stainless steel polishing paste evenly to the cotton cloth and polish smoothly along the length of the ice skate. During the process, control the polishing pressure evenly and use a reciprocating speed higher than that of fine polishing to facilitate full contact between the polishing paste and the bottom edge of the ice skate and exert a physical polishing effect, which helps to improve the surface roughness and gloss of the bottom edge of the ice skate.

[0079] In practice, the full-size inspection in steps S10, S30, and S60 is the key to controlling the contour, arc accuracy, and surface roughness of the ice skate blade bottom edge. The data collection from these three full-size inspections provides a reference for the selection of sandpaper grit and the control of polishing pressure in the polishing process.

[0080] In specific implementation, the replacement of sandpaper and the corresponding quick-change pad 6 during the rough polishing, semi-fine polishing and fine polishing processes in steps S11, S21, S41 and S51 is the key to ensuring the dimensional accuracy of the bottom edge arc surface contour. It ensures that the inner arc groove of the quick-change pad 6 completely presses the sandpaper tightly against the bottom edge arc surface, achieving simultaneous cutting of the arc surface.

[0081] In practice, as the surface roughness of the bottom edge gradually increases in steps S11, S21, S41, and S51, timely cleaning of residual sand particles and iron filings on the sandpaper surface and timely replacement of new sandpaper are the key to gradually improving the surface roughness of the arc-shaped surface. Timely cleaning of sand particles and iron filings mixed into powder or replacing new sandpaper can effectively prevent further scratches on the bottom edge surface.

[0082] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for conformal polishing of the bottom edge of ice skates for speed racing on ice tracks, characterized in that, Includes the following steps: A. Perform full-dimensional inspection on the CNC-machined ice skate blank, and collect the arc dimension, surface profile, line profile, surface roughness, step pitch texture depth, and polishing allowance of the bottom edge of the ice skate. B. Perform rough polishing based on the data detected in step A; C. Perform a second full-size inspection on the ice skate after rough polishing, and collect the arc dimension, surface profile, line profile, surface roughness and polishing allowance of the bottom edge after rough polishing. By comparing the data from the first and second inspections and the number of rough polishing cycles, calculate the cutting amount of the initial sandpaper for each polishing step. D. Based on the test data, perform localized trimming and polishing, and then perform semi-finished polishing in sequence; E. During the polishing process, the remaining amount is simultaneously detected and fine polishing is carried out in sequence. F. Perform a third full-size inspection on the finely polished ice skate, and collect the arc dimension, surface profile, line profile, and surface roughness of the bottom edge after fine polishing. The overall profile and arc dimension of the finely polished ice skate should meet the technical requirements. The remaining micro-polishing allowance is 0.001-0.003mm, and the surface roughness value should reach 0.

4. G. Based on the test data, perform localized finishing and polishing, followed by sequential grinding and polishing; The conformal polishing device for the bottom edge of the ice skate blade used in the ice track racing bobsleigh mainly consists of a handle (1), a base (3), two clamping plates (4) and a quick-change pad (6). The handle (1) is located above the base (3) and is an integral structure therewith. The quick-change pad (6) is installed below the base (3) and is fixed by two limiting bolts (2). The two clamping plates (4) are located on the left and right sides of the width direction of the base (3). Each clamping plate (4) is fixed to the base (3) by a set of clamping bolts (5). The clamping bolts (5) and the clamping plates (4) are used in combination. By adjusting the clamping bolts (5), the clamping plates (4) press the cutting medium onto the sides of the base (3) and the quick-change pad (6) respectively. The handle (1) is oval-shaped with a long tail, which is suitable for the operator to grip tightly and apply pushing and pressure. The base (3) has a dovetail-shaped groove at the bottom, which facilitates the replacement of the quick-change pad (6) as needed. The base (3) has two countersunk holes at the top, which are used to install the limit bolt (2) and hide it on the top surface of the base (3). The quick-change pad (6) has a dovetail-shaped punch structure at the top, which is in clearance fit with the dovetail-shaped groove of the base (3). The quick-change pad (6) has a semi-circular groove at the bottom along the length of its outer shape. The quick-change pad (6) is made of aluminum, plastic, nylon, wood and high-density foam. The arc size of the through groove can be processed according to the arc size of the bottom edge of the ice skate to be processed. The cutting medium includes aluminum, plastic, nylon, wood and high-density foam.

2. The conformal polishing method for the bottom edge of a bobsleigh blade on an ice track according to claim 1, characterized in that: In step A, select appropriate grit sandpaper based on the step pattern and surface roughness, and adjust the grit of sandpaper appropriately with reference to the machining allowance. Confirm the arc size of the polishing device base (3) based on the arc size and the selected sandpaper thickness.

3. The conformal polishing method for the bottom edge of a bobsleigh blade on an ice track according to claim 1, characterized in that, Step B specifically includes the following steps: B1. After determining the initial grit of sandpaper and the arc size of the base, install the quick-change pad (6) on the base (3), and fix the sandpaper by tightening the bolts (5) with two sets of clamping plates (4). Place the polishing device and the sandpaper in the same direction as the bottom edge of the ice skate to be polished, and operate the polishing device to polish quickly and repeatedly along the length of the ice skate. Use the cutting action of the sandpaper to perform the first-order rough polishing on the surface of the bottom edge of the ice skate. B2. Replace the sandpaper with 600 grit and 800 grit respectively, and repeat the first step of rough polishing to perform the second and third steps of rough polishing. The depth of the convex and concave points of the bottom edge profile pattern gradually decreases until there are no visible convex and concave points. When changing the sandpaper, replace the quick-change pad (6) according to its thickness.

4. The conformal polishing method for the bottom edge of a bobsleigh blade on an ice track according to claim 1, characterized in that, Step D specifically includes the following steps: D1. Based on the second full-size inspection data, identify the abnormal locations of the bottom edge profile, polishing allowance, and surface roughness. Use the third step of rough polishing to locally polish the abnormal locations. During local polishing, control the polishing pressure to be lower than the normal value. Simultaneously use a micrometer to check and adjust the local polishing allowance until it reaches the overall average value. Use a comparison method to improve the surface roughness of the abnormal parts to the overall level. For the abnormal profile parts, use the bottom plane of the quick-change pad of the polishing device to adjust the part using a motion trajectory-following polishing technique. Use an R gauge to check until the overall bottom edge standard is met. D2. After repairing the abnormal parts in the rough polishing, the same operation steps as rough polishing are used. The grit of sandpaper is adjusted to 1000 grit, 1200 grit, 1500 grit and 2000 grit in sequence for semi-fine polishing. During semi-fine polishing, as the grit of sandpaper increases and the contact area increases, the pressure applied to the polishing device is appropriately increased. At the same time, in each step of semi-fine polishing, the polishing allowance is measured with a micrometer, the surface roughness standard plate is compared, and the bottom edge arc shape is measured with an R gauge.

5. The conformal polishing method for the bottom edge of a bobsleigh blade on an ice racing track according to claim 1, characterized in that, Step E specifically includes the following steps: E1. Perform process inspection on the bottom edge of the ice skate after semi-finish polishing. Use a micrometer to further measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the arc shape of the bottom edge. Mark and record abnormal parts. Use the fourth step of semi-finish polishing to perform local polishing treatment on the abnormal parts. During the local fine polishing process, control the polishing pressure to be lower than the normal value. E2. After local repairs, repeat the semi-finish polishing steps, adjusting the sandpaper grit to 2500, 3000, 3500, and 5000 in sequence for fine polishing in four stages. During fine polishing, increase the pressure applied to the polishing device appropriately as the sandpaper grit increases, and promptly clean any residual sand particles and iron filings from the sandpaper surface. In each stage of fine polishing, use a micrometer to measure the polishing allowance, use a surface roughness standard plate for comparison, and use an R gauge to measure the bottom edge arc shape.

6. The conformal polishing method for the bottom edge of a bobsleigh blade on an ice racing track according to claim 1, characterized in that, Step G specifically includes the following steps: G1. Based on the third full-size inspection data, identify the abnormal surface roughness of the bottom edge. Use the fourth step of fine polishing to locally repair and polish the abnormal locations. During the local polishing process, control the polishing pressure to be lower than the normal value, and use the comparison method to repair and improve the surface roughness of the abnormal parts to the overall level. G2. After local repairs, replace the quick-change pad of the polishing device to ensure that the inner arc groove of the quick-change pad completely presses the polishing cotton cloth tightly against the arc surface of the bottom blade. Apply stainless steel polishing paste evenly to the cotton cloth and polish smoothly along the length of the ice skate. During the process, control the polishing pressure to be uniform and use a reciprocating speed higher than that of the fine polishing operation.

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