Multi-beam laser quenching method

Abstract

The invention provides a multi-beam laser quenching method, and relates to the technical field of quenching, the multi-beam laser quenching method comprises the step of providing a plurality of laser beam sources during quenching, and more accurate heating and cooling control is realized through dynamic adjustment of the laser beam irradiation sequence, time and power by the multi-beam laser quenching method. According to real-time surface temperature data, the uniformity and depth adjustability of a hardened layer on the surface of the workpiece are ensured, the power, irradiation time and scanning path of the laser beam are adjusted according to the real-time surface temperature data, and uniform distribution of the surface temperature of the workpiece is realized, so that the thermal stress problem in the traditional technology is reduced, the heating effect is optimized, and the uniformity of the surface temperature of the workpiece is ensured; and the cooling rate is controlled, the compactness of a hardened layer is ensured, the wear resistance and fatigue resistance of the workpiece are enhanced, the quenching process is optimized, the surface quality of the workpiece is improved, higher innovativeness and adaptability are achieved, and the method is particularly suitable for surface hardening treatment of workpieces in complex shapes or made of special materials.

Description

Technical Field

[0001] The invention relates to the field of quenching, in particular to a multi-beam laser quenching method. Background Art

[0002] Laser quenching technology is a surface hardening technology that heats the surface of a metal workpiece through the high energy density of a laser beam and uses rapid cooling to produce martensitic structure, thereby improving the wear resistance, hardness and fatigue resistance of the workpiece.

[0003] When using multi-beam laser quenching, multiple laser beam sources are simultaneously irradiated onto the surface of the workpiece being processed. The multiple laser beams then heat the workpiece, followed by subsequent cooling to complete the quenching. Lack of precision in the coordinated control of these multiple laser beams can easily lead to uneven temperature fields during the heating process, which can affect the quenching effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that when multiple laser beams are coordinated and controlled, the control is not precise enough, which easily leads to an uneven temperature field during the heating process, and then causes problems that affect the quenching effect.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a multi-beam laser quenching method, comprising the following steps:

[0006] Step 1: During quenching, multiple laser beam sources are provided, and the wavelength, power, and irradiation time of the multiple laser beams can be adjusted individually;

[0007] Step 2: focusing multiple laser beam sources on the surface of the workpiece, and then the beams of the multiple laser beam sources form an overlapping area on the surface of the workpiece to be quenched;

[0008] Step 3: Adjust the irradiation sequence and irradiation time of each laser beam individually so that each laser beam source irradiates different areas of the workpiece surface in different time periods to ensure uniform surface temperature of the workpiece;

[0009] Step 4: Adjust and control the irradiation power and scanning path of the laser beam source to quickly heat the workpiece surface to the required temperature and quickly cool the workpiece to achieve a quenching effect.

[0010] Preferably, the overlapping area between the beams of the multiple laser beam sources is 10% to 90%, and the heating uniformity is optimized by adjusting the area of ​​the overlapping area of ​​the beams.

[0011] The effect achieved by the above components is: by adjusting the area of ​​the beam overlap area of ​​multiple laser beam sources, the heating uniformity is optimized and more precise control of the workpiece surface temperature is ensured. The area of ​​the overlapping area is set between 10% and 90%, which can be adjusted according to specific needs to achieve the best heating effect, effectively avoiding local overheating or insufficient heating. The optimized heat distribution further improves the quality and uniformity of the quenching layer.

[0012] Preferably, the wavelengths and powers of the multiple laser beam sources can be independently adjusted according to the material and shape of the workpiece to be processed, and the multiple laser beam sources are adapted to the material and shape of the workpiece to achieve the best quenching effect.

[0013] The effect achieved by the above components is: it can adapt to workpieces of different materials and shapes. According to the physical properties and geometric shape of the workpiece, the adjustment of the laser beam can ensure the best quenching effect, avoid quenching defects caused by inappropriate laser parameters, so that different types of workpieces can receive targeted treatment, which greatly improves the hardness and wear resistance of the workpiece.

[0014] Preferably, the workpiece surface is cooled by gas or liquid cooling means to make the hardened layer on the workpiece surface dense, thereby improving the wear resistance and strength of the workpiece.

[0015] The effects achieved by the above components are: it can effectively make the hardened layer dense, further improve the wear resistance and strength of the workpiece, prevent cracks or uneven hardening during the hardening process, and the appropriate cooling rate enables the workpiece to obtain the required surface hardness and enhance its service life. This cooling step is an indispensable part of the quenching process in order to ensure the final quenching effect.

[0016] Preferably, the irradiation time and scanning path of the laser beam source are adjusted in real time according to the surface temperature of the workpiece, and the surface temperature of the workpiece is adjusted in real time to ensure the uniformity of the workpiece surface during heating.

[0017] The effects achieved by the above components are: ensuring the uniformity of the heating process. The real-time temperature monitoring system ensures that the temperature changes in each area are within the control range, avoiding overheating or excessive temperature differences. Through dynamic temperature adjustment, the surface temperature control of the workpiece becomes more precise, preventing deformation caused by thermal stress and improving the uniformity and quality of the hardened layer on the workpiece surface.

[0018] Preferably, the surface temperature of the workpiece is monitored in real time and compared with a set temperature curve, the irradiation power and scanning path of the laser beam are adjusted using a closed-loop control system, and the temperature is monitored and closed-loop controlled to ensure uniformity of temperature distribution during the quenching process.

[0019] The effects achieved by the above components are: ensuring the uniformity of temperature distribution during the quenching process, effectively avoiding the generation of areas with too high or too low temperatures, improving the quality of the quenching layer and the performance of the workpiece. Through this system, the entire quenching process can be more stable and controllable.

[0020] Preferably, the multiple laser beam sources adopt synchronous control technology, and the multiple laser beam sources irradiate multiple areas at the same time to reduce thermal stress caused by thermal gradient and avoid deformation or cracking of the workpiece.

[0021] The above components achieve the following effects: irradiating multiple areas at the same time reduces thermal stress caused by thermal gradients. This synchronized control reduces the risk of workpiece deformation or cracking, ensuring the structural integrity of the workpiece throughout the quenching process. This not only improves processing efficiency but also enhances the overall hardening effect of the workpiece. By effectively controlling thermal stress, the quenching process is optimized.

[0022] Preferably, the power, irradiation time and cooling rate of the laser beam are adjusted to achieve surface hardening effects of the workpiece at different depths.

[0023] The effect achieved by the above components is: the surface hardening effect of the workpiece at different depths can be precisely controlled. The control of different hardening depths provides the workpiece with a customized surface hardening layer, which meets the needs of different working conditions. The workpiece surface not only has sufficient hardness, but also maintains internal toughness. By using this method, more complex quenching requirements can be achieved and the overall performance of the workpiece can be improved.

[0024] In summary, the beneficial effects of the present invention are:

[0025] The multi-beam laser quenching method achieves more precise heating and cooling control by dynamically adjusting the laser beam irradiation sequence, time and power, ensuring the uniformity and adjustable depth of the hardened layer on the workpiece surface.

[0026] By adopting a closed-loop feedback control system, the power, irradiation time and scanning path of the laser beam are adjusted according to real-time surface temperature data to achieve uniform distribution of workpiece surface temperature, thereby reducing the thermal stress problem in traditional technology.

[0027] By adjusting the overlapping area between the laser beam sources between 10% and 90%, the heating effect is optimized, the uniformity of the workpiece surface temperature is ensured, and the problem of excessive temperature gradients in traditional single-beam laser quenching technology is avoided.

[0028] By using precise gas or liquid cooling methods and controlling the cooling rate, the density of the hardened layer is ensured, and the wear resistance and fatigue resistance of the workpiece are enhanced.

[0029] Through the synergistic effect of multiple technical means, the quenching process is optimized and the surface quality of the workpiece is improved. It has higher innovation and adaptability and is especially suitable for surface hardening treatment of workpieces with complex shapes or special materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and examples.

[0031] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] Figure 1 A multi-beam laser quenching method shown includes the following steps:

[0035] Step 1: During quenching, multiple laser beam sources are provided, and the wavelength, power, and irradiation time of the multiple laser beams can be adjusted individually;

[0036] Step 2: focusing multiple laser beam sources on the surface of the workpiece, and then the beams of the multiple laser beam sources form an overlapping area on the surface of the workpiece to be quenched;

[0037] Step 3: Adjust the irradiation sequence and irradiation time of each laser beam individually so that each laser beam source irradiates different areas of the workpiece surface in different time periods to ensure uniform surface temperature of the workpiece;

[0038] Step 4: Adjust and control the irradiation power and scanning path of the laser beam source to quickly heat the workpiece surface to the required temperature and quickly cool the workpiece to achieve a quenching effect.

[0039] Figure 1The overlapping area between the beams of the multiple laser beam sources shown is 10% to 90%. Heating uniformity is optimized by adjusting the area of ​​the beam overlap. Adjusting the area of ​​the overlapping area between the multiple laser beam sources optimizes heating uniformity and ensures more precise control of the workpiece surface temperature. The overlapping area is set between 10% and 90%, and can be adjusted according to specific needs to achieve the best heating effect, effectively avoiding local overheating or insufficient heating. The optimized heat distribution further improves the quality and uniformity of the quenched layer.

[0040] Figure 1 The wavelength and power of the multiple laser beam sources shown can be independently adjusted based on the material and shape of the workpiece being processed. Multiple laser beam sources are tailored to the workpiece material and shape to achieve the optimal quenching effect. The wavelength and power of the laser beam sources can be independently adjusted to accommodate workpieces of varying materials and shapes. Adjustment of the laser beams based on the workpiece's physical properties and geometry ensures optimal quenching results, avoiding quenching defects caused by inappropriate laser parameters. This allows for targeted treatment of different workpiece types, significantly improving their hardness and wear resistance. The workpiece surface is cooled using gas or liquid cooling to densify the hardened layer, thereby improving the workpiece's wear resistance and strength. Cooling the workpiece surface using gas or liquid cooling effectively densifies the hardened layer, further improving the workpiece's wear resistance and strength, and preventing cracks or uneven hardening during the hardening process. An appropriate cooling rate ensures the desired surface hardness, extending the workpiece's service life. This cooling step is essential to the quenching process to ensure the ultimate quenching effect.

[0041] Figure 1The laser beam source's irradiation time and scanning path are adjusted in real time based on the workpiece's surface temperature to ensure uniform heating of the workpiece surface. A real-time temperature monitoring system ensures that temperature variations in each area remain within a controlled range, preventing overheating or excessive temperature differences. This dynamic temperature adjustment allows for more precise surface temperature control, preventing deformation caused by thermal stress and improving the uniformity and quality of the hardened layer on the workpiece surface. The workpiece surface temperature is monitored in real time and compared to a set temperature curve. A closed-loop control system adjusts the laser beam's irradiation power and scanning path, ensuring uniform temperature distribution during the quenching process. By monitoring the workpiece surface temperature in real time and comparing it to a set temperature curve, the closed-loop control system intelligently adjusts the laser beam's irradiation power and scanning path. This closed-loop system ensures uniform temperature distribution during the quenching process, effectively avoiding areas of excessively high or low temperatures. This precise temperature control improves the quality of the quenched layer and workpiece performance, making the entire quenching process more stable and controllable.

[0042] Figure 1 The multiple laser beam sources shown utilize synchronized control technology, irradiating multiple areas simultaneously to reduce thermal stress caused by thermal gradients and prevent workpiece deformation or cracking. Synchronized control ensures that multiple laser beams irradiate multiple areas simultaneously, minimizing thermal stress caused by thermal gradients. This synchronized control reduces the risk of workpiece deformation or cracking and ensures the structural integrity of the workpiece throughout the quenching process. The simultaneous action of multiple laser beams not only improves processing efficiency but also enhances the overall hardening effect of the workpiece. Effective control of thermal stress ensures a more successful quenching process. Adjusting the laser beam power, irradiation time, and cooling rate allows for precise control of the workpiece surface hardening effect at varying depths. This control provides a customized surface hardening layer for each workpiece, meeting the requirements of varying working conditions. By adjusting these parameters, the workpiece surface achieves sufficient hardness while maintaining internal toughness. This approach allows for more complex quenching requirements and improves the overall performance of the workpiece.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to make changes or convert them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not deviate from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A multi-beam laser quenching method, characterized in that: The following steps are involved: Step 1: During quenching, multiple laser beam sources are provided, and the wavelength, power, and irradiation time of the multiple laser beams can be adjusted individually; Step 2: focusing multiple laser beam sources on the surface of the workpiece, and then the beams of the multiple laser beam sources form an overlapping area on the surface of the workpiece to be quenched; Step 3: Adjust the irradiation sequence and irradiation time of each laser beam individually so that each laser beam source irradiates different areas of the workpiece surface in different time periods to ensure uniform surface temperature of the workpiece; Step 4: Adjust and control the irradiation power and scanning path of the laser beam source to quickly heat the workpiece surface to the required temperature and quickly cool the workpiece to achieve a quenching effect.

2. The multi-beam laser quenching method according to claim 1, characterized in that: The overlapping area between the beams of the multiple laser beam sources is 10% to 90%, and the heating uniformity is optimized by adjusting the area of ​​the overlapping area of ​​the beams.

3. The multi-beam laser quenching method according to claim 1, characterized in that: The wavelengths and powers of the multiple laser beam sources can be independently adjusted according to the material and shape of the workpiece to be processed. The multiple laser beam sources are adapted to the material and shape of the workpiece to achieve the best quenching effect.

4. The multi-beam laser quenching method according to claim 1, characterized in that: The workpiece surface is cooled by gas or liquid cooling means to make the surface hardened layer of the workpiece dense, thereby improving the wear resistance and strength of the workpiece.

5. The multi-beam laser quenching method according to claim 1, characterized in that: The irradiation time and scanning path of the laser beam source are adjusted in real time according to the surface temperature of the workpiece.

6. The multi-beam laser quenching method according to claim 5, characterized in that: The surface temperature of the workpiece is adjusted in real time to ensure the uniformity of the workpiece surface during heating.

7. The multi-beam laser quenching method according to claim 6, characterized in that: The real-time monitoring of the workpiece surface temperature and comparison with the set temperature curve, the use of a closed-loop control system to adjust the irradiation power and scanning path of the laser beam, and the temperature monitoring and closed-loop control are carried out to ensure the uniformity of temperature distribution during the quenching process.

8. The multi-beam laser quenching method according to claim 7, characterized in that: The multiple laser beam sources adopt synchronous control technology, and the multiple laser beam sources irradiate multiple areas at the same time to reduce thermal stress caused by thermal gradient and avoid deformation or cracking of the workpiece.

9. The multi-beam laser quenching method according to claim 8, characterized in that: The power, irradiation time and cooling rate of the laser beam are adjusted to achieve surface hardening effects of workpieces at different depths.

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