A laser head optical path verification tool for a laser cutting machine
By designing a laser head optical path calibration fixture and using a pentaprism strip to correct the laser head optical path deviation, the problem of laser beam deviation was solved, thereby improving the cutting accuracy and efficiency of the laser cutting machine.
Patent Information
- Application Number
- CN202521854702.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-29
AI Technical Summary
The laser head of the laser cutting machine is not perpendicular to the worktable, causing the laser beam to deviate from the design angle and form a divergent beam, which requires optical path verification.
Design a laser head optical path calibration fixture, including a frame, a pentaprism strip and a backplate. The pentaprism strip is used to deflect the laser beam for calibration to confirm whether the optical path is skewed. The total internal reflection of the pentaprism strip is used to correct the optical path of the laser head.
It achieves simple and efficient optical path verification, reduces usage costs, is applicable to existing laser cutting machines, and improves laser cutting accuracy.
Smart Images
Figure CN224674001U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser cutting equipment technology, and in particular to a laser head optical path calibration fixture for laser cutting machines. Background Technology
[0002] A laser cutting machine is a precision machining device that uses a high-power laser beam to cut materials non-contactly. It is widely used in the processing of metals, non-metals, and composite materials. Its principle is to focus the laser beam on the surface of the workpiece, causing the area irradiated by the ultra-fine focal spot to melt and vaporize instantly. Automatic cutting is achieved by moving the irradiation position of the laser spot through a CNC mechanical system. With prolonged use, long-term vibration, mechanical wear, loosening of fixing screws, or mechanical stress deformation can cause the laser head to become non-perpendicular to the worktable. This can lead to the reflector inside the laser head deviating from its designed angle, causing the emitted laser beam to be skewed when it hits the focusing lens, resulting in a divergent beam. Therefore, it is necessary to verify the optical path of the emitted laser beam. Utility Model Content
[0003] Therefore, it is necessary to provide a laser head optical path calibration fixture for laser cutting machines to address the above problems.
[0004] A laser head optical path calibration fixture for a laser cutting machine includes a frame, a laser head, a back plate, a pentaprism strip, and a worktable. The worktable has a sliding groove on its edge. The frame is inverted U-shaped, and its base is engaged within the sliding groove. The laser head is mounted on the frame and moves in a reciprocating linear motion along the frame. The laser head is located directly above the worktable. A testing platform is located at the rear end of the worktable, and a vertical back plate is mounted on the testing platform. A fixing seat for fixing the pentaprism strip is mounted on the base. The pentaprism strip is located directly below the laser head and is used to refract the laser beam emitted by the laser head onto the back plate.
[0005] Preferably, the pentaprism strip is made of diamond and coated with an anti-reflection film.
[0006] Preferably, the frame is further provided with a cable tray, which is arranged side by side with the frame to support the cable that is electrically connected to the laser head.
[0007] Preferably, the bottom of the workbench is provided with feet.
[0008] Preferably, the mounting base is provided with a water tank for dissipating heat from the pentaprism strip.
[0009] The advantages of this invention are: it uses a pentaprism strip to deflect the laser beam emitted by the laser head and compares and verifies it with the initial spot position on the back plate to confirm whether there is any deviation in the optical path of the laser head. The verification operation is simple, can be directly integrated into existing laser cutting machines, has low operating costs, and is highly practical. Attached Figure Description
[0010] Figure 1 This is a three-dimensional schematic diagram of a laser head optical path verification fixture for a laser cutting machine, as one embodiment.
[0011] Figure 2 This is a top view schematic diagram of a laser head optical path calibration fixture for a laser cutting machine. Detailed Implementation
[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0013] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0015] like Figures 1-2As shown, a laser head optical path calibration fixture for a laser cutting machine includes a frame 1, a laser head 2, a slide rail 3, a pentaprism strip 4, a back plate 5, and a worktable 6. The worktable 6 has a sliding groove 61 on its side. The frame 1 is inverted U-shaped, and the base 11 of the frame 1 is engaged in the sliding groove 61. The laser head 2 is mounted on the frame 1 and moves in a reciprocating linear motion along the frame 1. The laser head 2 is located directly above the worktable 6. A detection platform 62 is provided at the rear end of the worktable 6. A vertical back plate 3 is installed on the detection platform 62. A fixing seat 12 for fixing the pentaprism strip 4 is installed on the base 11. The pentaprism strip 4 is located directly below the laser head 2 and is used to refract the laser beam emitted by the laser head 2 onto the back plate 3. Specifically, in this embodiment, the frame 1 serves as the carrier of the laser head 2 and is mounted on the worktable 6. After the workpiece (not shown in the figure) is placed on the worktable 6, it passes under the laser head 2. The laser head 2 emits a high-energy laser beam to cut the workpiece. The laser head 2 can move along the frame 1, facilitating the cutting of plate-shaped workpieces. During the movement of the laser head 2 along the frame 1, the internal lens and the guide rail on the frame 1 will inevitably be subjected to vibration, resulting in offset and wear. This causes a shift in the perpendicularity of the laser beam emitted by the laser head 2, which requires correction. During calibration, maintenance personnel place the pentaprism strip 4 between the two mounting bases 12. At this time, the pentaprism strip 4 is located directly below the laser head 2. The laser head 2 emits a low-energy laser beam, which is incident on the inclined surface of the pentaprism strip 4 at a 45° angle. At this time, the optical path meets the critical angle condition for total internal reflection. The first reflection occurs on the inclined surface of the pentaprism strip, and the second reflection occurs on the right-angled surface of the reflecting pentaprism strip 4. Finally, the laser beam exits at a 90° angle to the incident direction and falls on the back plate 3. The position of the initial spot recorded on the back plate 3 is compared with the original position to confirm whether they coincide. If they do, it indicates that the laser beam emitted by the laser head 2 has no deviation. If not, the laser head 2 needs to be calibrated, such as by tightening the mounting screws of the laser head 2 or replacing the shock-absorbing pads.
[0016] Specifically, the pentaprism strip 4 is made of diamond and coated with an anti-reflection film. The anti-reflection film can increase the energy reflectivity to over 99.5%, significantly reducing heat absorption on the mirror surface. Diamond is an ultra-hard material, which enhances the surface strength of the pentaprism strip and prevents scratches.
[0017] like Figures 1-2 As shown, the frame 1 is also provided with a cable tray 13. The cable tray 13 is arranged side by side with the frame 1 to support the cables that are electrically connected to the laser head 2, to bundle the cables, and to prevent the cables from being scattered and obstructing the laser beam that is being verified.
[0018] like Figure 1 As shown, the bottom of the workbench 6 is provided with feet 63 for supporting and raising the workbench 6.
[0019] like Figures 1-2 As shown, the fixed base 12 is equipped with a water tank for cooling the pentaprism strip 4. When the laser beam emitted by the laser head 2 shines on the pentaprism strip 4, the pentaprism strip 4 inevitably gets hot. Utilizing its own thermal conductivity, the heat is conducted to the water tank of the fixed base 12, and the heat can be absorbed by the cooling body in the water tank, such as paraffin, thus completing the heat dissipation.
[0020] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A laser head optical path verification fixture for a laser cutting machine, characterized in that: The system includes a frame, a laser head, a backplate, a pentaprism strip, and a worktable. The worktable has a sliding groove on its edge. The frame is inverted U-shaped, and the frame base is engaged in the sliding groove. The laser head is mounted on the frame and moves in a reciprocating linear motion along the frame. The laser head is located directly above the worktable. A testing platform is located at the rear end of the worktable, and a vertical backplate is mounted on the testing platform. A fixing seat for fixing the pentaprism strip is mounted on the base. The pentaprism strip is located directly below the laser head and is used to refract the laser beam emitted by the laser head onto the backplate.
2. The laser head optical path verification fixture for a laser cutting machine as described in claim 1, characterized in that: The pentaprism strip is made of diamond and coated with an anti-reflective film.
3. The laser head optical path verification fixture for a laser cutting machine as described in claim 1, characterized in that: The frame is also provided with a cable tray, which is arranged side by side with the frame to support the cables that are electrically connected to the laser head.
4. The laser head optical path verification fixture for a laser cutting machine as described in claim 1, characterized in that: The workbench is equipped with feet at its bottom.
5. The laser head optical path verification fixture for a laser cutting machine as described in claim 1, characterized in that: The mounting base is equipped with a water tank for dissipating heat from the pentaprism strip.