Laser cutting method

Abstract

The application relates to the technical field of machining, in particular to a laser cutting method, which comprises the following steps: turning over a blank to a position where a first plane of the blank is at an alpha angle with a horizontal machining surface, and the first plane is arranged to be inclined downward along a first edge of the first plane towards a second edge of the first plane; starting a laser, the laser is incident in a vertical direction, and the first edge of the first plane of the blank is laser cut until the cutting depth reaches half of the thickness of the blank; turning over the blank again to the position where the first plane of the blank is at the alpha angle with the horizontal machining surface, and the first plane is arranged to be inclined upward along the first edge of the first plane towards the second edge of the first plane; starting the laser, the laser is incident in the vertical direction, and the first edge of a second plane of the blank is laser cut until the blank is cut through. It can be seen that the laser cutting is performed on two sides, the machining difficulty is reduced, the production efficiency, machining precision and product quality are improved, and micro cracks caused by excessively high cutting temperature can be avoided.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a laser cutting method. Background Technology

[0002] Currently, integral PCBN cutting tools have a back angle. The traditional back angle machining method is to control the angle of the grinding wheel through the grinding machine fixture and the grinding wheel angle, and then use a diamond grinding wheel to grind it. The larger the back angle, the larger the grinding allowance. This not only poses a risk of tool collision, but the large allowance will also cause excessive wear of the grinding wheel, reduce grinding efficiency, and make it difficult to control the actual wear of the grinding wheel.

[0003] To address the aforementioned issues, pulsed lasers are currently used to cut the back angle of PCBN blade blanks. However, due to the hardness of PCBN and the thickness of the blank, repeated laser cutting from one side is insufficient to penetrate the blank. Even if the blank is penetrated, it results in a large taper on the cut surface, affecting subsequent clamping and use. Furthermore, during the cutting process, the cutting temperature rises sharply with increasing cutting depth, leading to numerous microcracks, which reduces the quality of the PCBN blade and may even render it unusable. Summary of the Invention

[0004] The purpose of this application is to provide a laser cutting method that, to a certain extent, solves the technical problems existing in the prior art, such as when lasers repeatedly cut from one side of some thicker blanks, they cannot cut through them completely. Even if they do cut through, the cut surface will have a large taper, which will affect subsequent clamping and use. Furthermore, it will cause the cutting temperature to be too high, resulting in a large number of microcracks.

[0005] This application provides a laser cutting method for cutting a blank, the blank having a first plane and a second plane that are parallel and spaced apart, and multiple side surfaces connecting the first plane and the second plane. Both the first plane and the second plane have two opposing first sides and two opposing second sides. The laser cutting method includes the following steps:

[0006] Step 10: Flip the blank to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to slope downwards along its first side toward its second side;

[0007] Step 20: Move the laser emitting device to directly above the first side of the first plane, turn on the laser, and the laser is incident vertically to laser cut the first side of the first plane of the blank until the cutting depth reaches half the thickness of the blank.

[0008] Step 30: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to be inclined upward along its first side toward its second side;

[0009] Step 40: Move the laser emitting device directly above the first side of the second plane, turn on the laser, and the laser is incident vertically to laser cut the first side of the second plane of the blank until the blank is cut through, so that the corresponding side has an inclined back angle.

[0010] In the above technical solution, the following step is further included between step 20 and step 30:

[0011] Step 21: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to be inclined downward along its second side toward its first side;

[0012] Step 22: Move the laser emitting device to directly above the second side of the first plane, turn on the laser, and the laser is incident vertically to laser cut the second side of the first plane of the blank until the cutting depth reaches half the thickness of the blank.

[0013] In any of the above technical solutions, the following steps are further included after step 40:

[0014] Step 50: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is inclined upward along its second side toward the first side;

[0015] Step 60: Move the laser emitting device to directly above the second side of the second plane, turn on the laser, and the laser is incident vertically to laser cut the second side of the second plane of the blank until the blank is cut through.

[0016] In any of the above technical solutions, the blank is further defined as an axisymmetric shape, and the blank has an axis of symmetry parallel to the first plane, and the blank can be flipped around the axis of symmetry.

[0017] In any of the above technical solutions, further, in step 10, the blank is rotated clockwise by an angle α relative to the horizontal machining surface and with the axis of symmetry as the axis of rotational symmetry.

[0018] In any of the above technical solutions, further, in step 21, relative to the horizontal processing surface and with the axis of symmetry as the axis of rotational symmetry, the blank is flipped counterclockwise to its first plane horizontal position, and then flipped counterclockwise by angle α.

[0019] In any of the above technical solutions, further, in step 30, relative to the horizontal processing surface and with the axis of symmetry as the axis of rotational symmetry, the blank is rotated clockwise to its first plane horizontal position, and then rotated counterclockwise by (180+α) angles.

[0020] In any of the above technical solutions, further, in step 50, relative to the horizontal processing surface and with the axis of symmetry as the axis of rotational symmetry, the blank is flipped counterclockwise to its first plane horizontal position, and then flipped counterclockwise by angle α.

[0021] In any of the above technical solutions, the number of blanks is multiple, and the multiple blanks are arranged sequentially at intervals along the horizontal processing surface. Each blank has a symmetry axis parallel to the first plane, and all the symmetry axes are located in the same plane and are arranged parallel to each other. Each blank is equipped with a laser emitting device.

[0022] In any of the above technical solutions, the laser cutting method further includes the following steps: when the finished product and the scrap are not completely separated after cutting, a rubber hammer is used to strike the scrap to separate it from the finished product.

[0023] In any of the above technical solutions, further, 0°≤α≤90°.

[0024] In any of the above technical solutions, the blank is further described as a blade blank made of PCBN.

[0025] Compared with the prior art, the beneficial effects of this application are as follows:

[0026] The laser cutting method provided in this application can be used to laser cut blade blanks. By controlling the tilt angle of the blank, a blade blank with a back angle can be directly processed, which greatly improves production efficiency and saves grinding costs. Moreover, the laser cutting method uses double-sided cutting, which can ensure complete cutting through while reducing cutting difficulty, further improving production efficiency and ensuring processing accuracy, which is helpful for subsequent clamping and use. In addition, double-sided cutting can effectively avoid the problem of excessive cutting temperature caused by single-sided cutting, thereby avoiding the generation of micro-cracks and greatly improving product quality and yield. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the blank provided in Embodiment 1 of this application at different processing stages;

[0029] Figure 2This is a schematic diagram of the laser cutting method provided in Embodiment 1 of this application;

[0030] Figure 3 This is a schematic diagram of the blank provided in Embodiment 2 of this application at different processing stages;

[0031] Figure 4 This is a schematic diagram of the laser cutting method provided in Embodiment 2 of this application;

[0032] Figure 5 This is a schematic diagram of the blank provided in Embodiment 3 of this application at different processing stages;

[0033] Figure 6 This is a schematic diagram of the laser cutting method provided in Embodiment 3 of this application.

[0034] Figure label:

[0035] 1-Blank, 11-First plane, 12-Second plane, 13-First side, 14-Second side, 15-First edge, 16-Second edge, 17-Scrap material, 2-Finished product. Detailed Implementation

[0036] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0037] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0038] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] The following reference Figures 1 to 6 This application describes a laser cutting method according to some embodiments.

[0042] Example 1

[0043] See 1 and Figure 2 As shown, an embodiment of this application provides a laser cutting method for cutting a blank 1. The blank 1 has a first plane 11 and a second plane 12 that are arranged parallel to each other. The first plane 11 and the second plane 12 each have a first side 15 and a second side 16 that are arranged opposite to each other. A first side 13 is connected between the first plane 11 and the second plane 12. Preferably, the first side 13 is perpendicular to the first plane 11 and the second plane 12 respectively. Of course, it is not limited to this. The first side 13 may not be perpendicular to the first plane 11 and the second plane 12.

[0044] Furthermore, preferably, the laser cutting method provided in this application requires processing a rear angle on the first side surface 13, that is, after the first side surface 13 is cut, it changes from being parallel to the vertical plane to being inclined relative to the vertical plane. The laser cutting method provided in this application includes the following steps:

[0045] Step 10: Flip the blank 1 so that its first plane 11 is flipped to an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined downward along its first side 15 toward its second side 16;

[0046] Step 20: Move the laser emitting device directly above the first side 15 of the first plane 11, turn on the laser, and the laser is incident vertically to laser cut the first side 15 of the first plane 11 of the blank 1 until the cutting depth reaches half the thickness of the blank 1.

[0047] Step 30: Flip the blank 1 again to a position where its first plane 11 forms an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined upward along its first side 15 toward its second side 16;

[0048] Step 40: Move the laser emitting device to directly above the first side 15 of the second plane 12, turn on the laser, and the laser is incident in a vertical direction to laser cut the first side 15 of the second plane 12 of the blank 1 until the blank 1 is cut through, so that the first side 13 with the inclined rear angle is obtained, that is, the cut finished product 2 is obtained.

[0049] Further, preferably, such as Figure 2 As shown, α is an acute angle, that is, 0° < α < 90°. It can be seen that the back angle of the cut product 2 is α.

[0050] Furthermore, preferably, blank 1 is a blade blank made of PCBN material. This will be used as an example in the following text. Of course, it is not limited to this. Blank 1 can be a blank of other materials and types to be processed, depending on the actual needs.

[0051] As described above, the laser cutting method provided in this application can laser cut the blank 1. By controlling the tilt angle of the blank 1, a blade blank 1 with a back angle can be directly processed, which greatly improves production efficiency and saves grinding costs. Moreover, the laser cutting method uses double-sided cutting, which can ensure complete cutting through while reducing cutting difficulty, further improving production efficiency and ensuring processing accuracy, which is helpful for subsequent clamping and use. In addition, double-sided cutting can effectively avoid the problem of excessive cutting temperature caused by single-sided cutting, thereby avoiding the generation of micro-cracks and greatly improving product quality and yield.

[0052] It should be noted that there are currently many tooling fixtures that can drive the blank 1 to swing. Existing flipping tooling fixtures can be used to flip the workpiece. Of course, it is not limited to this. Workers can also manually flip the blank 1 to a specified angle, then use a fixture to fix it, and then process the back angle.

[0053] Furthermore, preferably, when multiple side surfaces need to be processed for rear corners, it is only necessary to repeat steps 1 to 4 above to cut and process multiple side surfaces in sequence to complete the processing of multiple rear corners.

[0054] In this embodiment, preferably, the laser cutting method further includes the following steps: when the finished product 2 and the scrap 17 are not completely separated after cutting, a rubber hammer is used to strike the cut blank 1 to separate the scrap 17 from the finished product 2.

[0055] As can be seen from the above description, using a rubber hammer to strike the cut blank 1 can not only quickly separate the scrap 17 from the finished product 2, but also avoid damaging the blank 1.

[0056] Furthermore, preferably, after all the above steps are completed, the blank 1 can be further finely ground to remove burrs and improve quality and precision.

[0057] Example 2

[0058] See Figure 3 and Figure 4 As shown, embodiments of this application provide a laser cutting method applied to cutting a blank 1. The blank 1 has a first plane 11 and a second plane 12 arranged parallel to each other. Both the first plane 11 and the second plane 12 have a first side 15 and a second side 16 arranged opposite to each other. A first side 13 and a second side 14 are connected between the first plane 11 and the second plane 12. Preferably, the laser cutting method provided by this application requires processing a back angle on the first side 13 and the second side 14, that is, after the first side 13 and the second side 14 are cut, they change from being parallel to the vertical plane to being inclined relative to the vertical plane. The laser cutting method provided by this application includes the following steps:

[0059] Step 10: Flip the blank 1 so that its first plane 11 is flipped to an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined downward along its first side 15 toward its second side 16;

[0060] Step 20: Move the laser emitting device directly above the first side 15 of the first plane 11, turn on the laser, and the laser is incident vertically to laser cut the first side 15 of the first plane 11 of the blank 1 until the cutting depth reaches half the thickness of the blank 1.

[0061] Step 21: Flip the blank 1 again to a position where its first plane 11 forms an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined downward along its second side 16 toward its first side 15;

[0062] Step 22: Move the laser emitting device to directly above the second side 16 of the first plane 11, turn on the laser, and the laser is incident in a vertical direction to laser cut the second side 16 of the first plane 11 of the blank 1 until the cutting depth reaches half the thickness of the blank 1.

[0063] Step 30: Flip the blank 1 again to a position where its first plane 11 forms an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined upward along its first side 15 toward its second side 16;

[0064] Step 40: Move the laser emitting device to directly above the first side 15 of the second plane 12, turn on the laser, and the laser is incident in a vertical direction to laser cut the first side 15 of the second plane 12 of the blank 1 until the blank 1 is cut through, so that the corresponding side has an inclined back angle.

[0065] Step 50: Flip the blank 1 again to a position where its first plane 11 forms an angle α with the horizontal machining surface, and the first plane 11 is set to be inclined upward along its second side 16 toward the first side 15;

[0066] Step 60: Move the laser emitting device to directly above the second side 16 of the second plane 12, turn on the laser, and the laser is incident in a vertical direction to laser cut the second side 16 of the second plane 12 of the blank 1 until the blank 1 is cut through, so that the corresponding side has an inclined back angle, and finally the cut finished product 2 is obtained.

[0067] It should be noted that: it is not limited to the above steps. Alternatively, steps 10 to 40 in Example 1 can be used to process the rear corner of one side completely first, and then steps 10 to 40 in Example 1 can be used to process the rear corner of the other side. The specific choice depends on the actual needs.

[0068] Further, preferably, such as Figure 4 As shown, α is an acute angle, that is, 0° < α < 90°. It can be seen that the inclination angle of the two opposite sides of the cut product 2, namely the third side and the fourth side, relative to the vertical plane is α. In other words, the back angle of the product 2 is α.

[0069] Furthermore, preferably, in this embodiment, the material of the blank 1 is a PCBN blade blank 1, and this will be used as an example for explanation later. Of course, it is not limited to this. The blank 1 can be other types of blanks to be processed, and the specific selection depends on the actual needs.

[0070] As described above, the laser cutting method provided in this application can laser cut the blade blank 1. By controlling the tilt angle of the blank 1, a blade with a back angle can be directly processed, which greatly improves production efficiency and saves grinding costs. Moreover, the laser cutting method uses double-sided cutting, which can ensure complete cutting through while reducing cutting difficulty, further improving production efficiency and ensuring processing accuracy, which is helpful for subsequent clamping and use. In addition, double-sided cutting can effectively avoid the problem of excessive cutting temperature caused by single-sided cutting, thereby avoiding the generation of micro-cracks and greatly improving product quality and yield.

[0071] Furthermore, regarding the need to process the rear corners of both opposing sides, namely the first side 13 and the second side 14, this application does not employ the method of first fully processing the rear corner of one side using steps 10 to 40 in Embodiment 1, and then processing the rear corner of the other side using steps 10 to 40 in Embodiment 1. Instead, it processes the first side 15 and the second side 16 of the first plane 11 first, and then flips it to process the first side 15 and the second side 16 of the second plane 12. In other words, it first completes the processing of a portion of the rear corners of the first side 13 and the second side 14, and then completes the processing of the other portion of the rear corners of the first side 13 and the second side 14, which is more efficient.

[0072] In this embodiment, preferably, as follows: Figure 3 As shown, blank 1 is an axisymmetric figure, and blank 1 has a symmetry axis parallel to the first plane 11, and blank 1 can be flipped on both sides with the symmetry axis as the center.

[0073] As described above, by rotating the blank 1 left and right along its own axis of symmetry, the blank 1 can be processed in different positions and orientations. This eliminates the need to remove and flip the blank 1, avoiding the loss of positioning accuracy caused by secondary clamping, thus further improving processing accuracy and helping to improve processing efficiency.

[0074] Further, preferably, such as Figure 3 As shown, blank 1 is in the shape of a cuboid. Of course, it is not limited to this. Blank 1 can also be a rhombus, a triangular prism, a pentagonal prism, or a hexagonal prism, etc.

[0075] In this embodiment, preferably, as follows: Figure 4 As shown, in step 10, relative to the horizontal machining surface and with the aforementioned axis of symmetry of the blank 1 as the axis of rotational symmetry, the blank 1 is rotated clockwise by an angle α. That is, the first plane 11 of the blank 1 is also rotated clockwise by an angle α in sync.

[0076] As can be seen from the above description, it is only necessary to rotate the blank 1 clockwise by an angle α, that is, to tilt the blank 1 and to cut half of it along the vertical direction with the laser to cut the first side 15 of the first plane 11 of the blank 1.

[0077] In this embodiment, preferably, as follows: Figure 4 As shown, in step 21, relative to the horizontal machining surface and with the aforementioned axis of symmetry of the blank 1 as the axis of rotational symmetry, the blank 1 is rotated counterclockwise until its first plane 11 is horizontally returned to its original position, and then rotated counterclockwise by an angle α.

[0078] As can be seen from the above description, based on the aforementioned steps 10 and 20, the blank 1 is first rotated back into position, that is, the blank 1 is rotated until its first plane 11 is parallel to the horizontal processing surface, and then it is rotated counterclockwise by angle α, thereby cutting the second side 16 of the first plane 11 of the blank 1.

[0079] In this embodiment, preferably, as follows: Figure 4 As shown, in step 30, relative to the horizontal processing surface, and with the aforementioned axis of symmetry of the blank 1 as the axis of rotational symmetry, the blank 1 is flipped clockwise to its first plane 11 and returned to its horizontal position, and then flipped clockwise by (180+α) angles.

[0080] As described above, based on the aforementioned steps 21 and 22, the blank 1 is first rotated back into position, that is, the blank 1 is rotated until its first plane 11 is parallel to the horizontal processing surface, and then rotated clockwise by (180+α) angles, thereby cutting the first side 15 of the second plane 12 of the blank 1, that is, cutting off the other half of the thickness of the blank 1 until it is cut through.

[0081] In this embodiment, preferably, as follows: Figure 4 As shown, in step 50, relative to the horizontal machining surface and with the aforementioned axis of symmetry of the blank 1 as the axis of rotational symmetry, the blank 1 is rotated counterclockwise until its first plane 11 is horizontally returned to its original position, and then rotated counterclockwise by an angle α.

[0082] As can be seen from the above description, based on the aforementioned steps 30 and 40, the blank 1 is first rotated back into position, that is, the blank 1 is rotated until its first plane 11 is parallel to the horizontal processing surface, and then it is rotated counterclockwise by angle α, thereby cutting the second side 16 of the second plane 12 of the blank 1, that is, cutting off the other half of the thickness of the blank 1 until it is cut through.

[0083] It can be seen that the blank 1 can be rotated left and right relative to its own axis of symmetry, that is, the axis of rotational symmetry, thereby realizing the cutting of the front and back sides. This improves the processing speed and helps to reduce the cutting temperature. Moreover, there is no need to re-clamp the blank 1, which improves the processing accuracy. Furthermore, there are currently many tooling fixtures that can drive the blank 1 to swing, making it easy to implement.

[0084] It should be noted that the processing is not limited to turning the blank 1 left and right edges. A worker can manually turn the blank 1 to a specified angle and then fix it with a fixture to process the rear angle. In other words, it only needs to meet the following conditions: In step 10, the first plane 11 of the blank 1 must ultimately form an angle α with the horizontal processing surface, and the first plane 11 is inclined downwards along its first side 15 towards its second side 16; In step 21, the first plane 11 of the blank 1 must ultimately form an angle α with the horizontal processing surface, and the first plane 11 is inclined downwards along its second side 16 towards its first side 15; In step 30, the first plane 11 of the blank 1 must ultimately form an angle α with the horizontal processing surface, and the first plane 11 is inclined upwards along its first side 15 towards its second side 16; In step 50, the first plane 11 of the blank 1 must ultimately form an angle α with the horizontal processing surface, and the first plane 11 is inclined upwards along its second side 16 towards its first side 15.

[0085] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, there are multiple blanks 1, and the multiple blanks 1 are arranged sequentially at intervals along the horizontal processing surface. Each blank 1 has a symmetry axis parallel to the first plane 11, and all the symmetry axes are located in the same plane and are arranged parallel to each other. Each blank 1 is equipped with a laser emitting device.

[0086] As can be seen from the above description, the laser cutting method provided in this application can cut multiple blanks 1 simultaneously, further improving processing efficiency.

[0087] In this embodiment, preferably, the laser cutting method further includes the following steps: when the finished product 2 and the scrap 17 are not completely separated after cutting, a rubber hammer is used to strike them so that the scrap 17 is separated from the finished product 2.

[0088] As can be seen from the above description, using a rubber mallet to strike the entire blank 1 can not only quickly separate the scrap 17 from the finished product 2, but also avoid damaging the blank 1.

[0089] Furthermore, preferably, after all the above steps are completed, the finished product 2 can be further finely ground to remove burrs and improve quality and precision.

[0090] Example 3

[0091] See Figure 5 and Figure 6As shown, Embodiment 3 of this application also provides a laser cutting method, which includes the laser cutting method described in Embodiment 1 above. The steps are the same as those of the laser cutting method disclosed in Embodiment 1. The only difference is that α = 0° in each step. That is, during processing, the blank 1 is always kept in a horizontal position. That is, the first plane 11 and the second plane 12 of the blank 1 are always parallel to the horizontal processing surface. After cutting off part of the structure of the first side 15 and the second side 16, the third side and the fourth side are always kept parallel to the vertical surface.

[0092] In addition, it is not limited to the above steps. Alternatively, one side can be fully processed using steps 10 to 40 in Example 1, and then the other side can be processed using steps 10 to 40 in Example 1, where α = 0°. The specific steps used can be selected according to actual needs.

[0093] It is evident that the laser cutting method provided in this application is not only suitable for processing inclined back angles, but also for ordinary cutting processes, that is, to achieve vertical cutting operations, thus having a wider range of applications.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A laser cutting method applied to cutting a blank, the blank having a first plane and a second plane that are parallel and spaced apart, and a plurality of side surfaces connecting the first plane and the second plane, each of the first plane and the second plane having two oppositely arranged first sides and second sides, characterized in that, The laser cutting method includes the following steps: Step 10: Flip the blank to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to slope downwards along its first side toward its second side; Step 20: Move the laser emitting device to directly above the first side of the first plane, turn on the laser, and the laser is incident vertically to laser cut the first side of the first plane of the blank until the cutting depth reaches half the thickness of the blank. Step 30: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to be inclined upward along its first side toward its second side; Step 40: Move the laser emitting device directly above the first side of the second plane, turn on the laser, and the laser is incident vertically to laser cut the first side of the second plane of the blank until the blank is cut through, so that the corresponding side has an inclined back angle.

2. The laser cutting method according to claim 1, characterized in that, The following steps are also included between step 20 and step 30: Step 21: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is set to be inclined downward along its second side toward its first side; Step 22: Move the laser emitting device to directly above the second side of the first plane, turn on the laser, and the laser is incident vertically to laser cut the second side of the first plane of the blank until the cutting depth reaches half the thickness of the blank.

3. The laser cutting method according to claim 2, characterized in that, The following steps are included after step 40: Step 50: Flip the blank again to a position where its first plane forms an angle α with the horizontal machining surface, and the first plane is inclined upward along its second side toward the first side; Step 60: Move the laser emitting device to directly above the second side of the second plane, turn on the laser, and the laser is incident vertically to laser cut the second side of the second plane of the blank until the blank is cut through.

4. The laser cutting method according to claim 3, characterized in that, The blank is an axisymmetric shape, and the blank has a symmetry axis parallel to the first plane, and the blank can be flipped on both sides with the symmetry axis as the center.

5. The laser cutting method according to claim 4, characterized in that, In step 10, the blank is rotated clockwise by an angle α relative to the horizontal machining surface and about the axis of symmetry; and / or In step 21, the blank is rotated counterclockwise relative to the horizontal machining surface and with the axis of symmetry as the axis of rotational symmetry, until its first plane is horizontally positioned, and then rotated counterclockwise by an angle α.

6. The laser cutting method according to claim 4, characterized in that, In step 30, relative to the horizontal machining surface and with the axis of symmetry as the axis of rotational symmetry, the blank is rotated clockwise until its first plane is horizontally positioned, and then rotated clockwise by (180+α) angles; and / or In step 50, the blank is rotated counterclockwise relative to the horizontal machining surface and with the axis of symmetry as the axis of rotational symmetry, until its first plane is horizontally positioned, and then rotated counterclockwise by an angle α.

7. The laser cutting method according to claim 1, characterized in that, The number of blanks is multiple, and the multiple blanks are arranged sequentially at intervals along the horizontal processing surface. Each blank has a symmetry axis parallel to the first plane, and all the symmetry axes are located in the same plane and are arranged parallel to each other. Each blank is equipped with a laser emitting device.

8. The laser cutting method according to claim 1, characterized in that, The laser cutting method further includes the following steps: when the finished product and scrap are not completely separated after cutting, a rubber hammer is used to strike the scrap to separate it from the finished product.

9. The laser cutting method according to claim 1, characterized in that, 0°≤α≤90°。 10. The laser cutting method according to any one of claims 1 to 9, characterized in that, The blank is a blade blank made of PCBN.

Images