Ice skate blade multi-field composite strengthening method

Abstract

The present application relates to the technical field of surface strengthening technology of sports equipment, in particular to a kind of ice skate blade multi-field composite strengthening method.The method comprises the following steps: adjusting laser head, so that laser beam covers the top surface and chamfer of ice skate blade;adjusting ultrasonic rolling device, so that rolling head is located at both sides of ice skate blade;according to the material properties of ice skate blade, determine the required laser energy and rolling force;while laser shock peening is carried out, double-sided rolling ultrasonic rolling strengthening is carried out on the side surface of ice skate blade.Through laser shock peening on the top surface of blade and double-sided rolling ultrasonic rolling, deformation and layer cracking can be avoided, at the same time, multiple energy fields are combined, the dynamic yield strength of the material is reduced, the material is more prone to plastic deformation and strengthening effect, deeper residual compressive stress is achieved, and the strengthening effect of the chamfer part is particularly beneficial.

Description

Technical Field

[0001] This invention relates to the field of surface strengthening technology for sports equipment, specifically to a multi-field composite strengthening method for ice skate blades. Background Technology

[0002] Ice skate blades are extremely sharp after being sharpened. Generally, ice skate blades are made of metal and have a very narrow blade. The blade of a common ice skate is only 2 millimeters wide, and even the widest figure skate blade does not exceed 4 millimeters. Speed ​​skating blades are just as fast as ordinary blades.

[0003] In addition, figure skaters need to sharpen their skates frequently to prevent the blades from becoming dull. Typically, the blades should be sharpened after 20 hours of skating.

[0004] Ice skates can be made of carbon steel tool steel, stainless steel, high-speed tool steel, powder metallurgy, or coated materials. Carbon steel tool steel is generally used by beginners. The quality of ice skates mainly depends on the carbon content. Although the hardness of ice skates used in the same event meets the same standard, due to the different grades of steel, under the same conditions, higher grade steel will make the ice skate edge last longer.

[0005] Ice skates can be broadly classified into three categories based on their structure and movement characteristics: speed skating skates, figure skating skates, and hockey skates. Although the three types of skates differ, their basic principles of pushing off the ice during skating are similar.

[0006] Speed ​​skating blades can be divided into long-track speed skating blades and short-track speed skating blades. Long-track speed skating blades have a longer blade body, a smaller blade curvature, a larger contact area with the ice surface, and a larger turning radius, making them suitable for long-distance skating on long tracks. Short-track speed skating blades have a shorter blade body, a larger blade curvature, a relatively smaller contact area with the ice surface, and a smaller turning radius, making them suitable for skating on short tracks (500m to 1000m). The blade body thickness is 1.4±0.1mm, and the hardness is HRC56 to 60.

[0007] Figure skates can be categorized into freestyle figure skates, prescribed figure skates, and ice dance figure skates based on their on-ice movements, serrations, and blade shape. Because figure skating primarily involves jumps and spins, the blade differs from other skates in its front serrations, ensuring that the lowest serration contacts the ice when the blade is tilted forward at a 10-degree angle. The blade is relatively thick, with standard-grade blades at least 3.5mm and advanced blades at least 3.8mm. The hardness is HRC 56–60, the blade is short, and the blade has a large curvature.

[0008] Ice hockey blades are divided into goalkeeper blades and player blades. Because players often need to stop suddenly and turn during the game, the blade needs to be strong. The blade thickness is 2.8±0.1mm, and it is arc-shaped with a straight section in the middle that is no less than 80mm.

[0009] The performance of the blade part of an ice skate directly affects its wear resistance and fatigue performance. Ultrasonic rolling and laser shock blasting are commonly used surface strengthening techniques. Ultrasonic rolling can achieve excellent surface roughness and grain refinement, while laser shock blasting can obtain deeper residual compressive stress. Studies have shown that the dynamic yield strength of metals decreases under ultrasonic vibration conditions, which can lower the threshold of laser shock blasting. Under the same conditions, it can increase the degree of plastic strain of the metal material and obtain deeper residual compressive stress.

[0010] Because the ultrasonic waves generated by ultrasonic rolling are shallow, typically only 0.3 mm deep, and the area where ultrasonic rolling is applied cannot be combined with laser shock peening, laser shock peening and ultrasonic rolling cannot achieve time synchronization and spatial overlap in composite strengthening. Generally, laser shock peening is performed first, followed by ultrasonic rolling strengthening. Summary of the Invention

[0011] (a) Technical problems to be solved

[0012] This invention addresses the above-mentioned problems by proposing a multi-field composite strengthening method for ice skate blades. The aim is to solve the problems of poor surface hardness, weak fatigue strength, and poor stress corrosion resistance of existing ice skate blades.

[0013] (II) Technical Solution

[0014] To achieve the above objectives, the present invention provides a method for multi-field composite reinforcement of ice skate blades, comprising the following steps:

[0015] Adjust the laser head so that the laser beam covers the top surface and chamfer of the ice skate blade;

[0016] Adjust the ultrasonic rolling device so that the rolling head is located on both sides of the ice skate blade;

[0017] The required laser energy and rolling force are determined based on the material properties of the ice skate blade.

[0018] While laser shock strengthening is being performed, the sides of the ice skate blade are also subjected to double-sided ultrasonic rolling strengthening.

[0019] Furthermore, the laser shock enhancement uses a rectangular or square light spot whose width covers the top surface and chamfer of the ice skate blade.

[0020] Furthermore, when performing double-sided ultrasonic rolling reinforcement on the side of the ice skate blade, the same control system is used to synchronize the loading force, amplitude, and frequency.

[0021] Furthermore, the arrival time of the shock wave in the laser shock enhancement is consistent with the time when the maximum pressure is applied in the ultrasonic rolling enhancement of the double-sided rolling ultrasonic rolling.

[0022] Furthermore, the ultrasonic rolling process parameters are as follows: amplitude of 0.1-2mm, frequency of 10-300Hz, speed of 0.1-10mm / s, and time of 1-60min.

[0023] Furthermore, the parameters of the laser shock strengthening process are: laser power of 0.1-10kW, repetition frequency of 1-100Hz, laser pulse width of 0.1-10ms, and number of shocks of 1-10.

[0024] Furthermore, a protective layer is formed on the top and side surfaces of the ice skate blade before laser shock hardening and ultrasonic rolling hardening.

[0025] Furthermore, the ice skate blade is surface-treated before laser shock hardening and ultrasonic rolling hardening.

[0026] (III) Beneficial Effects

[0027] Compared with the prior art, the present invention provides a multi-field composite strengthening method for ice skate blades. By simultaneously performing laser and ultrasonic composite strengthening on the ice skate, the multi-energy field enhancement effect is used to improve the laser shock strengthening depth, while reducing surface roughness. This achieves grain refinement, microhardness improvement, fatigue performance improvement, and stress corrosion resistance on the blade surface. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating the principle of a composite reinforcement method for ice skates disclosed in this application.

[0029] Figure 2 This is a composite reinforcement timing diagram disclosed in this application.

[0030] The reference numerals in the figure are: 1. Ice blade; 2. Ultrasonic rolling device; 2-1. Rolling head; 3. Laser shock peening device. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] like Figure 1 , Figure 2 As shown, a multi-field composite reinforcement method for ice skate blades according to the present invention includes the following steps:

[0033] Preparation S100: Prepare the ice skate 1 and the corresponding strengthening equipment, including the laser shock blasting device 3 and the ultrasonic rolling device 2. Determine the required laser energy and rolling force based on the material properties of the ice skate blade.

[0034] Adjust the laser head and ultrasonic rolling device S200: Adjust the laser head to a suitable position so that the laser beam can cover the top surface and chamfer of the ice skate blade. Adjust the ultrasonic rolling device to a suitable position so that the rolling head 2-1 is located on both sides of the ice skate blade.

[0035] Laser shock peening and ultrasonic rolling strengthening S300: The laser shock peening and ultrasonic rolling devices are activated simultaneously to strengthen the ice skate blade. The laser beam forms a thin molten zone on the blade surface, enhancing its surface hardness and wear resistance, while the rolling head compresses and plastically deforms the sides of the blade, further increasing its hardness and strength. During the strengthening process, the relative positions and strengthening parameters of the laser shock peening and ultrasonic rolling must be maintained to ensure consistent strengthening effects.

[0036] S400 Inspection and Testing: After reinforcement, inspect and test the ice skate blade to ensure the reinforcement effect meets requirements. If necessary, the reinforcement parameters can be adjusted to achieve better reinforcement results.

[0037] In the above embodiments, laser shock hardening and ultrasonic rolling hardening are performed simultaneously, which can effectively enhance the hardness and strength of the ice skate blade, and improve its service life and performance.

[0038] It should be noted that, as Figure 1 The ice skate blade has an approximately right-angled structure with a very small chamfer size and a relatively regular cross-section. Therefore, it is possible to achieve a combination of ultrasonic rolling and laser shock reinforcement in terms of structure.

[0039] Specifically, laser shock peening creates a thin molten zone on the surface of the ice skate blade. This molten zone cools rapidly and forms a reinforced layer, thus enhancing the hardness and wear resistance of the blade surface. Ultrasonic rolling, on the other hand, compresses and plastically deforms the sides of the ice skate blade, further increasing its hardness and strength. Because laser shock peening and ultrasonic rolling are performed simultaneously, deformation and cracking of the ice skate blade can be effectively prevented.

[0040] Both laser shock peening and ultrasonic rolling strengthen materials using different energy fields; combining multiple energy fields can achieve better strengthening effects. Laser shock peening generates high temperatures and pressures, making materials more susceptible to plastic deformation and strengthening. Ultrasonic rolling strengthens, on the other hand, generates high pressures and shear forces, promoting plastic deformation and grain refinement. Combining these two strengthening methods allows for deeper residual compressive stress, thereby enhancing the material's hardness and strength.

[0041] In addition, the chamfered area of ​​the ice skate blade is prone to damage and wear, requiring special reinforcement. A combination of laser shock peening and ultrasonic rolling can better strengthen the chamfered area, improving its wear resistance and service life.

[0042] Therefore, laser shock blasting of the blade top surface combined with ultrasonic rolling of both sides can avoid deformation and delamination. At the same time, by using multiple energy fields to reduce the dynamic yield strength of the material, the material is more likely to undergo plastic deformation and strengthening, achieving deeper residual compressive stress, which is especially beneficial to the strengthening effect of the chamfered part.

[0043] In this embodiment, laser shock peening uses a rectangular or square laser spot whose width covers the top surface and chamfer of the ice skate blade. The main reason for using a rectangular or square laser spot is to cover the top surface and chamfer of the ice skate blade, thereby creating a uniform residual compressive stress distribution on the blade surface. Using a rectangular or square laser spot ensures uniform distribution of laser energy on the blade surface, avoiding localized overheating and undercooling during laser peening, thus improving the uniformity and stability of the laser shock peening. Furthermore, a rectangular or square laser spot can better adapt to the shape and size of the ice skate blade surface, thereby improving the applicability and feasibility of laser shock peening.

[0044] In this embodiment, when performing double-sided ultrasonic rolling strengthening on the side of the ice skate blade, the same control system is used to synchronize the loading force, amplitude, and frequency. This ensures that the pressure and amplitude applied to both sides of the double-sided ultrasonic rolling strengthening are the same, thereby preventing blade deformation. If different control systems are used for double-sided ultrasonic rolling, it is likely that the pressure applied to the two sides will be different, resulting in uneven strengthening of the ice skate blade.

[0045] The aforementioned ice skate blade strengthening methods employ two different processes: laser shock blasting and ultrasonic rolling. These are combined in a specific timing sequence to achieve better strengthening results. Specifically, in this method, synchronizing the arrival time of the laser shock wave with the time of maximum pressure application during ultrasonic rolling yields the best strengthening effect.

[0046] When the ice skate blade material is subjected to laser shock, its physical properties change instantaneously, creating high-intensity compressive residual stress. Applying ultrasonic rolling at this point allows this residual stress to penetrate deeper into the material, further enhancing the strengthening effect. However, if the arrival time of the laser shock wave is not synchronized with the time of maximum pressure application during ultrasonic rolling, the strengthening effect may be reduced, potentially even leading to blade deformation. Therefore, ensuring time synchronization allows for better synchronous strengthening. This composite strengthening method can significantly improve the material's strength and hardness while reducing deformation and cracking.

[0047] In the ice skate blade strengthening method described in this embodiment, the ultrasonic rolling process parameters are as follows: amplitude of 0.1-2mm, frequency of 10-300Hz, speed of 0.1-10mm / s, and time of 1-60min.

[0048] The parameters for the laser shock peening process are: laser power of 0.1-10kW, repetition frequency of 1-100Hz, laser pulse width of 0.1-10ms, and number of shocks of 1-10.

[0049] Before laser shock peening and ultrasonic rolling, a protective layer is formed on the top and side surfaces of the ice skate blade. The protective layer can be made of materials such as metals, ceramics, and polymers, and can be prepared using processes such as physical vapor deposition, chemical vapor deposition, ion plating, and electroplating. Because laser peening causes a thermal impact on the ice skate blade surface, it can easily lead to the formation of microcracks. Therefore, forming a protective layer during laser shock peening can effectively reduce the thermal impact and microcrack formation, thereby improving the strength and wear resistance of the ice skate blade.

[0050] Before laser shock peening and ultrasonic rolling, the ice skate blades undergo surface treatment. This surface treatment removes oxides, grease, and dirt from the blade surface before multi-field composite strengthening, reducing surface roughness and enhancing surface smoothness and cleanliness. This results in more uniform and effective laser shock peening and ultrasonic rolling. Surface treatment can be performed using methods such as mechanical polishing, electrolytic polishing, and shot peening, depending on the blade material and surface condition.

[0051] To further illustrate the nature of the present invention, the following embodiments provide a detailed description of the enhanced method of the present invention. It should be understood that, except for the specific limitations referred to in the appended claims, the present invention is not limited to the particular conditions or details set forth in these embodiments.

[0052] Example 1

[0053] The ice skate blade was treated using this multi-field composite reinforcement method. The specific operation is as follows:

[0054] First, adjust the laser head and ultrasonic rolling device so that they are positioned on the top and sides of the ice skate blade, respectively. Based on the properties of the ice skate blade material, determine the required laser energy and rolling force. Next, perform laser shock peening using a rectangular laser spot whose width covers the top surface and chamfer of the ice skate blade. The laser power is 5kW, the repetition frequency is 50Hz, the laser pulse width is 5ms, and the number of impacts is 3. Simultaneously, perform double-sided ultrasonic rolling peening on the sides of the ice skate blade using the same control system. The loading force is 50N, the amplitude is 1.5mm, the frequency is 100Hz, the speed is 5mm / s, and the duration is 30min.

[0055] Example 2:

[0056] The other ice skate was treated using a multi-field composite reinforcement method for the blade, the specific operation of which is as follows:

[0057] Similarly, adjust the laser head and ultrasonic rolling device to position them on the top and sides of the ice skate blade, respectively. Determine the required laser energy and rolling force based on the properties of the ice skate blade material. Perform laser shock hardening treatment using a square laser spot whose width covers the top surface and chamfer of the ice skate blade. The laser power is 3kW, the repetition frequency is 20Hz, the laser pulse width is 8ms, and the number of impacts is 5. Simultaneously, perform double-sided ultrasonic rolling hardening on the sides of the ice skate blade using the same control system. The loading force is 40N, the amplitude is 1mm, the frequency is 50Hz, the speed is 2mm / s, and the duration is 20min.

[0058] Both embodiments employ a multi-field composite strengthening method for ice skate blades, but different process parameters are used to address different blade materials and requirements. These parameters include laser power, frequency, pulse width, and number of impacts, as well as ultrasonic rolling parameters such as amplitude, frequency, speed, and time. Embodiment 1 uses higher parameters, resulting in a more significant strengthening effect on the ice skate blade, but also requires a longer processing time. Embodiment 2 uses relatively lower parameters, suitable for ice skates with general requirements.

[0059] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for multi-field composite reinforcement of ice skate blades, characterized in that, Includes the following steps: Adjust the laser head so that the laser beam covers the top surface and chamfer of the ice skate blade; Adjust the ultrasonic rolling device so that the rolling head is located on both sides of the ice skate blade; The required laser energy and rolling force are determined based on the material properties of the ice skate blade. While performing laser shock strengthening, the sides of the ice skate blade are also subjected to double-sided ultrasonic rolling strengthening. When performing double-sided ultrasonic rolling strengthening on the side of the ice skate blade, the same control system is used to synchronize the loading force, amplitude, and frequency; the arrival time of the shock wave from the laser shock strengthening is consistent with the time when the ultrasonic rolling of the double-sided ultrasonic rolling strengthening applies the maximum pressure.

2. The method for multi-field composite reinforcement of ice skate blades as described in claim 1, characterized in that, The laser shock enhancement uses a rectangular or square light spot whose width covers the top surface and chamfer of the ice skate blade.

3. The method for multi-field composite reinforcement of ice skate blades as described in claim 1, characterized in that, The ultrasonic rolling process parameters are as follows: amplitude 0.1-2mm, frequency 10-300Hz, speed 0.1-10mm / s, and time 1-60min.

4. The method for multi-field composite reinforcement of ice skate blades as described in claim 1, characterized in that, The parameters for the laser shock peening process are: laser power of 0.1-10kW, repetition frequency of 1-100Hz, laser pulse width of 0.1-10ms, and number of shocks of 1-10.

5. The method for multi-field composite reinforcement of ice skate blades as described in claim 1, characterized in that, Before laser shock hardening and ultrasonic rolling hardening, a protective layer is formed on the top and side surfaces of the ice skate blade.

6. The method for multi-field composite reinforcement of ice skate blades as described in claim 1, characterized in that, The ice skate blade is surface treated before laser shock hardening and ultrasonic rolling hardening.

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