Plate surface strengthening device and method

Abstract

The invention discloses a plate surface strengthening device and method, and belongs to the technical field of material processing. According to the plate surface strengthening device, a laser beam is generated through a light source, and the laser beam is guided to a target material module through a first lens group, a second lens group and a focus lens in sequence; under the action of laser, the strengthening material on the target material module generates high-temperature plasma, the molten strengthening material is driven to drip and transfer to the to-be-strengthened surface of the target plate, and through a non-contact mode, the waste of the strengthening material is reduced, and the strengthening material is transferred to the surface of the plate in a molten state to form a strengthening layer, so that the strengthening effect is improved. And then laser beams are used for irradiating the strengthening layer, pores of the strengthening layer are eliminated, a stable bonding interface is formed with the surface of the plate, the stability of the strengthening surface is improved, and the problems that an existing plate surface strengthening method is poor in strengthening effect and various in working procedure are solved.

Description

Technical Field

[0001] This invention relates to a surface strengthening device and method for sheet metal, belonging to the field of materials processing technology. Background Technology

[0002] Surface strengthening technology is a key means to improve the corrosion resistance of materials and is widely used in fields such as machinery manufacturing, aerospace, and electronic equipment. In traditional methods, the coating formed by spraying has low bonding strength with the substrate interface and is easy to fall off; if electroplating is used, there are certain requirements for the surface morphology of the workpiece, and it is difficult to achieve uniform coverage on complex workpiece surfaces; moreover, heat treatment processes involve many steps, and multi-step processing leads to low efficiency and high cost. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a plate surface strengthening device and strengthening method, which transfers the strengthening material to the plate surface in a molten state, so that the material and the plate surface form a stable bonding interface, improves the stability of the strengthened surface, and solves the problems of poor strengthening effect and complicated process in the current plate surface strengthening method.

[0004] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: This invention provides a surface strengthening device for sheet metal, comprising: A light source used to generate a laser beam; The first mirror group is used to change the dispersion range of the laser beam; The second mirror group is used to change the propagation direction of the laser beam; A focusing lens is used to converge a laser beam; The fixing mechanism is used to fix the target plate. Target module, used to provide reinforcing materials; A moving mechanism, connected to the target module, is used to drive the target module to move parallel to the target plate. The laser beam passes through the first mirror group, the second mirror group and the focusing lens in sequence, and irradiates the target module, causing the strengthening material on the target module to transform into high-temperature plasma and molten state. The high-temperature plasma-driven molten strengthening material is dripped onto the surface of the target plate to be strengthened, forming a strengthening layer.

[0005] Optionally, the target module includes a transparent substrate and a reinforcing material coating disposed on one side of the transparent substrate; The reinforcing material coating is positioned opposite the surface of the target plate to be reinforced.

[0006] Optionally, the reinforcing material includes chromium or titanium.

[0007] Optionally, the first mirror group includes collimating mirrors arranged coaxially away from the light source for converting divergent laser beams into parallel beams and beam expanders for expanding the laser beam.

[0008] Optionally, the second mirror group includes a laser galvanometer for controlling the deflection of the laser beam in the XY plane.

[0009] Optionally, it also includes a visual inspection mechanism for observing the surface strengthening effect of the target sheet material.

[0010] In another aspect, the present invention provides a method for strengthening the surface of a sheet metal, the method being based on the aforementioned sheet metal surface strengthening apparatus, comprising: S1. Fix the target material onto the fixing mechanism; S2. Move the target module between the focusing lens and the target plate; S3. Turn on the light source using the first parameter, and adjust the second mirror group so that the laser beam irradiates the target module; A portion of the reinforcing material on the target module is transformed into high-temperature plasma, which drives a portion of the molten reinforcing material to drip and transfer onto the surface of the target plate to be reinforced, thus obtaining a deposition layer. S4. Turn off the light source and move the target module so that the focusing lens is facing the deposited layer; S5. The second parameter is used to turn on the light source, so that the laser beam irradiates the deposition layer to form a reinforcement layer.

[0011] Furthermore, a visual inspection mechanism is used to observe the reinforcement layer. If there are pores in the reinforcement layer, steps S2 to S5 are repeated until the pores are eliminated.

[0012] Furthermore, the first parameter includes a light source power of 1~5W, a laser pulse width of 15~25ns, a frequency of 50~100kHz, and a scanning speed of 300~700mm / s.

[0013] Furthermore, the second parameter includes a light source power of 20W, a laser pulse width of 350ns, a frequency of 20kHz, and a scanning speed of 1500mm / s.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. This invention generates a laser beam through a light source and guides the laser beam onto a target module through a first mirror group, a second mirror group, and a focusing lens in sequence. The laser causes the reinforcing material on the target module to melt and drip onto the surface of the target plate to be reinforced. This non-contact method reduces the waste of reinforcing material and allows the reinforcing material to be transferred to the plate surface in a plasma state, forming a stable bonding interface between the material and the plate surface. This improves the stability of the reinforced surface and solves the problems of poor reinforcement effect and numerous processes in current plate surface reinforcement methods.

[0015] 2. In this invention, after the reinforcing material is transferred to the surface of the plate in a plasma state to form a deposition layer, the deposition layer is then irradiated with a light source using a second parameter to remelt the deposition, thereby forming a dense and smooth reinforcing layer on the surface of the deposition layer and improving the stability of the reinforced surface. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a plate surface strengthening device provided in an embodiment of the present invention; Figure 2 This is a flowchart of a method for strengthening the surface of a sheet metal according to an embodiment of the present invention.

[0017] In the diagram: 1. Light source; 2. First lens group; 201. Collimating lens; 202. Beam expander; 3. Visual inspection mechanism; 4. Second lens group; 5. Focusing lens; 6. Fixing mechanism; 7. Target module; 701. Transparent substrate; 702. Reinforcing material coating; 8. Moving mechanism; 801. Motor; 802. Transmission screw; 803. Support base; 9. Reinforcing layer; 10. Target plate; 11. Worktable; 12. Laser beam. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0019] like Figure 1 As shown, a surface strengthening device for sheet metal includes: a light source 1, a first lens group 2, a second lens group 4, a focusing lens 5, a fixing mechanism 6, a target module 7, and a moving mechanism 8. The light source 1 is mounted on the worktable 11 to generate the laser beam 12; The first mirror group 2, the second mirror group 4, and the focusing mirror 5 are all mounted on the worktable 11. The first mirror group 2 includes a collimating mirror 201 and a beam expander 202 arranged coaxially away from the light source 1. When the laser beam 12 passes through the collimating mirror 201 and the beam expander 202 in sequence, the scattered laser beam first becomes a parallel beam and then expands. The second mirror group 4 includes a laser galvanometer. When the laser beam 12 enters the laser galvanometer, the laser beam 12 can be deflected in the XY plane. After the laser beam 12 enters the focusing lens 5, it converges to a single point; Both the moving mechanism 8 and the fixing mechanism 6 are mounted on the workbench 11. The target plate 10 is fixed to the fixing mechanism 6, and the target module 7 is mounted on the moving mechanism 8. The moving mechanism 8 can drive the target module 7 to move parallel to the surface to be strengthened of the target plate 10 above the fixing mechanism 6. Specifically: In this embodiment, the moving mechanism 8 adopts a common screw drive form, including a motor 801, a transmission screw 802, and a support base 803. A clamp adapted to the target module 7 is installed on the support base 803 to clamp the target module 7 on the support base 803. The motor 801 is used to drive the transmission screw 802. The power output end of the motor 801 is connected to the transmission screw 802. The support base 803 is connected to the transmission screw 802. When the transmission screw 802 rotates, the support base 803 drives the target module 7 to move along the extension direction of the transmission screw 802. Since the screw drive form is the prior art, its detailed working principle will not be described in detail. The fixing mechanism 6 uses a suction cup. The bottom surface of the target plate 10 is attracted and fixed by the suction cup, and the top of the target plate 10 faces the focusing lens 5, which is the surface to be strengthened. The target module 7 includes a transparent substrate 701 and a reinforcing material coating 702 located at the bottom of the transparent substrate 701. The reinforcing material includes chromium or titanium. The motor 801 is started, and under the action of the transmission screw 802, the target module 7 moves to directly above the target plate 10. The light source 1 is turned on, and the laser beam 12 passes through the first mirror group 2, the second mirror group 4 and the focusing lens 5 in sequence, irradiating the target module 7. The laser beam 12 penetrates the transparent substrate 701 and acts on the reinforcing material coating 702, causing the reinforcing material part to be transformed into high-temperature plasma and molten state. Under the driving action of the high-temperature plasma, the molten reinforcing material drips and transfers to the surface of the target plate 10 to be reinforced, forming the reinforcing layer 9. The board surface strengthening device also includes a vision inspection mechanism 3, which can observe the strengthening effect on the surface of the target board 10. In this embodiment, the visual inspection mechanism 3 uses a CCD (charge coupled device) industrial camera. Example 2

[0020] A method for strengthening the surface of a plate based on the above-mentioned plate surface strengthening device includes: S1. Fix the target material onto the fixing mechanism; S2. Move the target module between the focusing lens and the target plate; S3. Turn on the light source using the first parameter, adjust the second mirror group, and make the laser beam irradiate the target module. It should be noted that in this embodiment, the strengthening material coating of the target module is a chromium layer plated on one side of a 1mm soda-lime glass substrate by magnetron sputtering. The chromium layer on the target module is transformed into a high-temperature plasma and a molten state. The molten chromium drips and transfers to the surface of the target plate to be strengthened, thus obtaining a chromium deposition layer. The first parameter includes a light source power of 1~5W, a laser pulse width of 15~25ns, a frequency of 50~100kHz, and a scanning speed of 300~700mm / s; in this embodiment, the light source power of the first parameter is 2W, the laser pulse width is 20ns, the frequency is 80kHz, and the scanning speed is 500mm / s. S4. Turn off the light source and move the target module so that the focusing lens is facing the deposited layer; S5. The light source is turned on using the second parameter, so that the laser beam irradiates the deposition layer to form an enhanced layer; wherein, the second parameter includes a light source power of 20W, a laser pulse width of 350ns, a frequency of 20kHz, and a scanning speed of 1500mm / s.

[0021] The strengthening layer is observed using a visual inspection mechanism. If there are pores in the strengthening layer, steps S2 to S5 are repeated to remelt the chromium deposited layer until the pores on the final strengthening layer are eliminated.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] 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 surface strengthening device for sheet metal, characterized in that, include: Light source (1) is used to generate laser beam (12); The first mirror group (2) is used to change the dispersion range of the laser beam (12); The second mirror group (4) is used to change the propagation direction of the laser beam (12); Focusing lens (5) is used to focus the laser beam (12). Fixing mechanism (6) is used to fix the target plate (10); Target module (7) is used to provide reinforcing materials; The moving mechanism (8) is connected to the target module (7) and is used to drive the target module (7) to move parallel to the target plate (10); The laser beam (12) passes through the first mirror group (2), the second mirror group (4) and the focusing lens (5) in sequence, and irradiates the target module (7), causing the strengthening material on the target module (7) to transform into high-temperature plasma and molten state; The high-temperature plasma-driven molten strengthening material is dripped onto the surface of the target plate (10) to be strengthened, forming a strengthening layer (9).

2. The plate surface strengthening device according to claim 1, characterized in that, The target module (7) includes a transparent substrate (701) and a reinforcing material coating (702) disposed on one side of the transparent substrate (701). The reinforcing material coating (702) faces the surface to be reinforced of the target plate (10).

3. The plate surface strengthening device according to claim 2, characterized in that, The reinforcing material includes chromium or titanium.

4. The plate surface strengthening device according to claim 1, characterized in that, The first mirror group (2) includes a collimating mirror (201) for converting a diverging laser beam (12) into a parallel beam and a beam expander (202) for expanding the laser beam, which are arranged coaxially away from the light source (1).

5. The plate surface strengthening device according to claim 1, characterized in that, The second mirror group (4) includes a laser galvanometer for controlling the deflection of the laser beam (12) in the XY plane.

6. The plate surface strengthening device according to claim 1, characterized in that, It also includes a visual inspection mechanism (3) for observing the surface strengthening effect of the target board (10).

7. A method for strengthening the surface of a sheet metal, characterized in that, The method is based on the plate surface strengthening device according to any one of claims 1 to 6, comprising: S1. Fix the target material onto the fixing mechanism; S2. Move the target module between the focusing lens and the target plate; S3. Turn on the light source using the first parameter, and adjust the second mirror group so that the laser beam irradiates the target module; A portion of the reinforcing material on the target module is transformed into high-temperature plasma, which drives a portion of the molten reinforcing material to drip and transfer onto the surface of the target plate to be reinforced, thus obtaining a deposition layer. S4. Turn off the light source and move the target module so that the focusing lens is facing the deposited layer; S5. The second parameter is used to turn on the light source, so that the laser beam irradiates the deposition layer to form a reinforcement layer.

8. The method for strengthening the surface of a sheet metal according to claim 7, characterized in that, The reinforcement layer is observed using a visual inspection mechanism. If pores are found in the reinforcement layer, steps S2 to S5 are repeated until the pores are eliminated.

9. The method for strengthening the surface of a sheet metal according to claim 8, characterized in that, The first parameter includes light source power of 1~5W, laser pulse width of 15~25ns, frequency of 50~100kHz, and scanning speed of 300~700mm / s.

10. The method for strengthening the surface of a sheet metal according to claim 8, characterized in that, The second parameter includes a light source power of 20W, a laser pulse width of 350ns, a frequency of 20kHz, and a scanning speed of 1500mm / s.

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