Rotary cutting device for laser drilling and laser drilling equipment

Abstract

The utility model belongs to the technical field of laser cutting, and particularly provides a rotary cutting device for laser drilling, which comprises a window mirror, a rotary driving part and an angle adjusting part, the rotary driving part is used for driving the window mirror to rotate around the optical axis of incident light; the angle adjusting piece is used for adjusting the included angle between the window mirror and the optical axis of incident light. According to the rotary cutting device for laser drilling, the inclination angle and the rotating speed of the window mirror are adjusted, the incident angle of a laser beam irradiating the metal surface and the rotating angle of the laser beam around the rotating shaft are changed, drilling is carried out layer by layer, drilling and micromachining of a three-dimensional complex component can be achieved, and the production efficiency is improved. The micro-hole with high depth-diameter ratio (greater than or equal to 10: 1), high processing quality, zero cone and even inverted cone is obtained, and the problems of large upper and lower aperture difference and large taper of the drilled hole are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to laser cutting technical field, concretely relates to a kind of rotary cutting device and laser drilling equipment for laser drilling. BACKGROUND

[0002] With the high-speed development of industrial technology, high-accuracy micro-hole is applied in various industries, and its development trend is small aperture, large depth, high accuracy and wide application materials (such as high-strength, high-hardness, high-toughness, high-melting-point metals, ceramics, glass, high-molecular materials and crystals). Traditional micro-hole processing technologies mainly include mechanical processing, electric spark, chemical corrosion and ultrasonic drilling, which have their own characteristics, but cannot meet higher micro-hole processing requirements. For example, mechanical processing has low processing efficiency for high-hardness and high-brittle materials, and it is difficult to process holes smaller than 0.2 mm; electric spark can only process metal materials. Laser drilling has advantages of high efficiency, small limit aperture, high accuracy, low cost and almost no material selectivity, and has become one of the mainstream technologies for micro-hole processing.

[0003] The most commonly used processing method for current laser drilling is galvanometer scanning, which can be scanned layer by layer or spirally, but the galvanometer scanning has the disadvantage of being unable to avoid taper. During hole making, due to the divergence of focused laser beam and multiple reflection phenomena, the material ablation rate will sharply decrease with the increase of hole depth. Therefore, it is more difficult to prepare micro-holes with large depth-diameter ratio on thick materials. UTILITY MODEL CONTENTS

[0004] The utility model aims to overcome the problem of thick metal drilling and large taper of laser drilling in the prior art.

[0005] Therefore, the utility model provides a rotary cutting device for laser drilling, which comprises a window mirror, a rotary driving part and an angle adjusting part. The rotary driving part is used to drive the window mirror to rotate around the incident light optical axis. The angle adjusting part is used to adjust the included angle between the window mirror and the incident light optical axis.

[0006] Specifically, the rotary cutting device for laser drilling further comprises a shell. The shell is provided with a light channel. The window mirror is installed in the shell and arranged on the light channel.

[0007] Specifically, the rotary cutting device for laser drilling further comprises a control module. The control module is connected with the rotary driving part and the angle adjusting part respectively.

[0008] The utility model further provides a laser drilling equipment, which comprises a laser and the above-mentioned rotary cutting device for laser drilling. The window mirror is located on the laser light path emitted by the laser.

[0009] Specifically, the laser drilling device further comprises an expander mirror; the expander mirror is arranged between the laser and the rotary cutting device; and the expander mirror is located on a laser light path emitted by the laser.

[0010] Specifically, the laser drilling device further comprises a reflector; the reflector is located on a laser light path output by the rotary cutting device.

[0011] Specifically, the laser drilling device further comprises a field lens; the field lens is located on a reflected light path of the reflector.

[0012] Specifically, the laser drilling device further comprises a worktable; the worktable is provided with a drilling station; and the drilling station is located on an emergent light path of the field lens.

[0013] Compared with the prior art, the laser drilling device has the following advantages and beneficial effects:

[0014] The rotary cutting device for laser drilling provided by the utility model can realize three-dimensional complex component drilling and micro-processing by adjusting the window mirror inclination angle and the rotation speed, changing the incident angle of the laser beam irradiating the metal surface and the angle of the light beam rotating around the rotation axis, and drilling layer by layer, and can obtain micro-holes with high depth-diameter ratio (≧10:1), high processing quality, zero taper or even reverse taper, and solve the problems of large upper and lower aperture difference and large taper of the drilled holes. The window mirror inclination angle Φ change can change the drilling diameter and the taper, and the rotation speed ω change can affect the taper and the drilling quality, and the optimal parameters can be found by testing at different angles and different rotation speeds, and the through hole without taper can be punched on the metal sheet.

[0015] The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structure schematic diagram of the rotary cutting device for laser drilling provided by the utility model.

[0017] Figure 2 is the structure schematic diagram of the laser drilling device provided by the utility model.

[0018] Mark explanation: 1, laser; 2, expander mirror; 3, rotary cutting device; 301, window mirror; 302, shell; 4, reflector; 5, field lens; 6, material; 7, worktable; 8, control module. DETAILED DESCRIPTION

[0019] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.

[0020] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0021] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features; in the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0022] Referring to Figure 1 The utility model provides a kind of rotary cutting device for laser drilling, including window mirror 301, rotary drive part and angle adjusting part;The rotary drive part is used to drive the window mirror 301 rotates around incident light optical axis;The angle adjusting part is used to adjust the included angle between the window mirror 301 and incident light optical axis.Laser beam is offset after passing through the window mirror 301 of inclination due to refractive index, and the window mirror 301 autorotation can make laser beam do rotary cutting, thereby realizing metal drilling.When using, the included angle Φ of the window mirror 301 of rotary cutting device 3 and incident laser beam is set by angle adjusting part, then the rotation speed ω of window mirror 301 around optical axis is driven by rotary drive part, to control taper and drilling quality.Before drilling, test is carried out under different included angle Φ and different rotation speed ω, and the best Φ and ω parameters that meet drilling diameter, taper and drilling quality requirement are found.The included angle of window mirror 301 and rotation speed are controlled at the parameters, and through hole without taper is punched on material.The inclination angle Φ change of window mirror 301 can change drilling diameter and taper, and the rotation speed ω change can influence taper and drilling quality.

[0023] Specifically, the angle adjusting member comprises a window mirror frame and an angle scale dial, the window mirror is pressed in the window mirror frame by a pressing ring, the angle scale dial is installed on the window mirror frame, and a parallel pointer is arranged on the angle scale dial.

[0024] Optionally, the rotating driving member comprises a rotating motor, a driving end of the rotating motor is connected with the window mirror frame, and the window mirror frame drives the window mirror to rotate around the incident light axis.

[0025] Further, the rotating and cutting device for laser drilling further comprises a shell 302, the shell 302 is internally provided with a light channel, and the window mirror 301 is installed in the shell 302 and arranged on the light channel.

[0026] Specifically, the rotating and cutting device for laser drilling further comprises a control module 8, the control module 8 is connected with the rotating driving member and the angle adjusting member respectively.

[0027] Referring to Figure 2 The utility model further provides a kind of laser drilling equipment, including laser 1 and above-mentioned rotating and cutting device 3 for laser drilling;The window mirror 301 is located on the laser light path of the laser 1 emission.The laser of laser 1 emission is offset after passing through the window mirror 301 of inclination due to refractive index, and the window mirror 301 can make laser beam cut in rotation during rotation, thereby realizing metal drilling.Laser 1 emission can also be regulated by control module 8.

[0028] Optionally, the laser drilling equipment further comprises a beam expander 2, the beam expander 2 is arranged between the laser 1 and the rotating and cutting device 3, and the beam expander 2 is located on the laser light path of the laser 1 emission.

[0029] In order to facilitate the control of the propagation direction of the laser beam, the installation position of each structure of the laser drilling equipment is adjusted, and the laser drilling equipment further comprises a mirror 4, preferably a 45° mirror 4; the mirror 4 is located on the laser light path output by the rotary cutting device 3. The mirror 4 is used to change the propagation direction of the light beam, so that the laser reflected by the rotary cutting device 3 after adjustment can be reflected to the material to be drilled.

[0030] In a refined embodiment, the laser drilling equipment further comprises a field lens 5; the field lens 5 is located on the reflected light path of the mirror 4. The field lens 5 is used to focus the laser beam, so as to generate a very high energy density on the surface of the material and perform cutting and drilling.

[0031] Further, the laser drilling equipment further comprises a worktable 7; the worktable 7 is provided with a drilling station; the drilling station is located on the emergent light path of the field lens 5. In use, the material to be drilled 6 is placed on the drilling station, and the laser emitted by the field lens 5 is used to drill the material.

[0032] In summary, the laser drilling equipment provided by the present application can change the incident angle of the laser beam irradiating the metal surface and the angle of the light beam rotating around the rotation axis by adjusting the inclination angle and the rotation speed of the window mirror 301 of the rotary cutting device 3, so as to perform drilling layer by layer, realize the drilling and micro-processing of three-dimensional complex components, obtain micro-holes with high depth-diameter ratio (≧10:1), high processing quality, zero taper or even reverse taper, and solve the problems of large difference between the upper and lower hole diameters and large taper of the drilled holes. The inclination angle Φ of the window mirror 301 can change the drilling diameter and the taper, and the rotation speed ω can affect the taper and the drilling quality. By testing at different angles and different speeds, the optimal parameters can be found, and a through hole without taper can be punched on the metal sheet.

[0033] The laser drilling equipment has super-high peak power and super-narrow pulse width, which can effectively improve the material removal efficiency and has the effect of cold processing, thereby reducing the thermal effect of metal drilling.

[0034] The above examples are only illustrative of the present application and do not constitute a limitation on the protection scope of the present application. Any design identical or similar to the present application falls within the protection scope of the present application.

Claims

1. A rotary cutting device for laser drilling, characterized by: The application relates to a window mirror (301), a rotating driving element and an angle adjusting element; the angle adjusting element is used for adjusting the included angle between the window mirror (301) and the optical axis of incident light; the angle adjusting element comprises a window mirror frame and an angle scale dial; the window mirror 301 is pressed in the window mirror frame through a pressing ring, and the angle scale dial is installed on the window mirror frame; the rotating driving element comprises a rotating motor; the driving end of the rotating motor is connected with the window mirror frame, and the window mirror frame drives the window mirror (301) to rotate around the optical axis of incident light.

2. A rotating cutting device for laser drilling as claimed in claim 1, characterized in that: The application further comprises a shell (302); the shell (302) is internally provided with a light channel; the window mirror (301) is installed in the shell (302) and is arranged on the light channel.

3. The rotating cutting device for laser drilling of claim 1, wherein: The application further comprises a control module (8); the control module (8) is connected with the rotating driving element and the angle adjusting element respectively.

4. A laser drilling apparatus, characterized by: The application comprises a laser (1) and the rotary cutting device (3) for laser drilling according to any one of claims 1-3; the window mirror (301) is located on the laser light path emitted by the laser (1).

5. The laser drilling apparatus of claim 4, wherein: The application further comprises an expander mirror (2); the expander mirror (2) is arranged between the laser (1) and the rotary cutting device (3); and the expander mirror (2) is located on the laser light path emitted by the laser (1).

6. The laser drilling apparatus of claim 4, wherein: The application further comprises a reflecting mirror (4); the reflecting mirror (4) is located on the laser light path output by the rotary cutting device (3).

7. The laser drilling apparatus of claim 6, wherein: The application further comprises a field mirror (5); the field mirror (5) is located on the reflected light path of the reflecting mirror (4).

8. The laser drilling apparatus of claim 7, wherein: The application further comprises a carrier table (7); the carrier table (7) is provided with a drilling station; the drilling station is located on the emergent light path of the field mirror (5).

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