A laser processing device

Abstract

The present invention discloses a laser processing device, which includes a frame, a Y-axis movement mechanism, a clamping table, an X-axis movement mechanism, a Z-axis movement mechanism, a laser component and a laser box; the Y-axis movement mechanism is arranged on the frame; the clamping table is arranged on the Y-axis movement mechanism, and the Y-axis movement mechanism drives the clamping table to move back and forth. The clamping table is used for clamping a bar stock, and the clamping table drives the bar stock to swing around the C-axis and rotate around the A-axis. The length direction of the bar stock is parallel to the A-axis; the X-axis movement mechanism is arranged on the frame; the Z-axis movement mechanism is arranged on the X-axis movement mechanism; the laser component is fixed on the frame and is used for generating laser; the laser box is used for processing a workpiece. The laser component is connected to the laser box through an optical path, and the laser box is arranged on the Z-axis movement mechanism, and the Z-axis movement mechanism drives the laser head to move along the Z-axis direction. The present invention provides a laser processing device with convenient processing, which can reduce the possibility of interference during processing.

Description

Technical Field

[0001] The present invention relates to the technical field of laser machine tools, and in particular to a laser processing device. Background Art

[0002] In a machining center with more than four axes, a cradle is generally provided, and a turntable is provided on the cradle, so that a workpiece clamped on the turntable can be machined from multiple angles.

[0003] For example, the published text of Chinese Patent Application Publication No. CN112207430A: "A Five-Axis Laser Milling Machine Tool", in which the AC-axis turntable is used to clamp the workpiece.

[0004] However, as described in the above published text, when milling some relatively small workpieces with a laser, at the lowest point of the downward movement of the laser head, the bracket where the laser head is located is likely to interfere with the AC-axis turntable, and with the cradle-type design, in order to meet sufficient rigidity, the position where the turntable clamps the workpiece must be lower than the height of the A-axis, further resulting in a smaller machining range and making it difficult to flexibly machine the workpiece. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to solve at least one of the above-mentioned problems.

[0006] The solution of the present invention to solve its technical problem is as follows:

[0007] A laser processing device includes a frame, a Y-axis movement mechanism, a clamping table, an X-axis movement mechanism, a Z-axis movement mechanism, a laser component and a laser box; the Y-axis movement mechanism is arranged on the frame; the clamping table is arranged on the Y-axis movement mechanism, the Y-axis movement mechanism drives the clamping table to move back and forth, the clamping table is used for clamping a bar stock, the clamping table drives the bar stock to swing around the C-axis, the clamping table drives the bar stock to rotate around the A-axis, and the length direction of the bar stock is parallel to the A-axis; the X-axis movement mechanism is arranged on the frame; the Z-axis movement mechanism is arranged on the X-axis movement mechanism; the laser component is fixed on the frame, the laser component is used for generating laser; the laser box is used for machining a workpiece, the laser component is connected to the laser box through an optical path, the laser box is arranged on the Z-axis movement mechanism, and the Z-axis movement mechanism drives the laser head to move along the Z-axis direction.

[0008] As a further improvement of the above technical solution, the frame includes a base and a gantry, the Y-axis movement mechanism is arranged on the base, the X-axis movement mechanism is arranged on the gantry, and the laser component is arranged on the gantry.

[0009] As a further improvement of the above technical solution, the laser box includes a box body, a cavity is provided inside the box body, the laser box further includes an optical path element for transmitting laser, a laser processing head for laser processing, a positioning component for laser processing positioning, and a mounting bracket provided in the cavity. The laser processing head and the optical path element are optically connected. The mounting bracket is fixedly connected to the box body. The positioning component, the laser processing head and the optical path element are respectively fixed on the mounting bracket. An output hole communicating with the cavity is provided on the side surface of the box body. The laser processing head and the positioning component protrude outward from the output hole. The laser processing head is arranged along the direction of the X-axis movement mechanism. An input hole communicating with the cavity is provided on the box body. The input hole is used for inputting a laser optical path into the optical path element. The optical path element is optically connected to the laser component.

[0010] As a further improvement of the above technical solution, a plurality of laser processing heads are provided. The laser component includes a plurality of laser generators. The laser generators are arranged on the frame. The laser generators are arranged in one-to-one correspondence with the laser heads. The laser heads are optically connected to the laser generators.

[0011] As a further improvement of the above technical solution, the positioning component includes a contact probe and an industrial camera. The contact probe and the industrial camera are respectively fixed on the mounting bracket.

[0012] As a further improvement of the above technical solution, the clamping table includes a turntable arranged on the Y-axis movement mechanism, a bracket arranged on the turntable, a spindle motor arranged on the bracket, and a clamp arranged on the spindle motor. The rotation axis of the turntable is arranged along the Z-axis direction. The turntable drives the bracket to rotate around the rotation axis of the turntable. The axis of the output shaft of the spindle motor is collinear with the A-axis. The clamp is arranged outside the bracket. The clamp is used for clamping a workpiece. A clamping channel is provided on the clamp. The length direction of the clamping channel is parallel to the axis of the output shaft of the spindle motor.

[0013] As a further improvement of the above technical solution, the bracket includes a horizontal plate and a vertical plate. The horizontal plate and the vertical plate are fixedly connected. The horizontal plate and the vertical plate form an L shape. The turntable is drivingly connected to the horizontal plate. The fixed part of the spindle motor is fixedly connected to the vertical plate.

[0014] As a further improvement of the above technical solution, a through hole is provided on the vertical plate. The spindle motor is inserted through the through hole. The through hole is fixedly connected to the fixed part of the spindle motor. The clamp is arranged directly above the horizontal plate.

[0015] As a further improvement of the above technical solution, a first groove is formed in the bottom surface of the transverse plate, a second groove is formed in the vertical plate, and the first groove communicates with the second groove.

[0016] As a further improvement of the above technical solution, the first groove is arranged in the middle of the transverse plate, the second groove is arranged in the middle of the vertical plate, and the first groove and the second groove have the same width and depth.

[0017] The beneficial effect of the present invention is that the length of the bar stock is parallel to the A axis, the clamping table drives the bar stock to swing around the C axis, and the C axis extends vertically, so that the relative position between the bar stock and the laser box can be adjusted, enabling the laser box to process a workpiece, such as a workpiece clamped on the clamping table, from multiple angles. When laser milling is required for the workpiece, the workpiece can be rotated at a high speed around the A axis to achieve milling of the workpiece. Different from the traditional AC axis turntable where the C axis drives the workpiece to rotate and the A axis drives the workpiece to swing, the present invention adjusts the position and posture of the workpiece by driving the workpiece to swing around the C axis. When the laser box moves downward, interference between the laser box and the cradle of the traditional AC turntable can be avoided, providing a larger processing space; through the arrangement of the X-axis movement mechanism, Y-axis movement mechanism, and Z-axis movement mechanism, relative movement between the laser box and the clamping table in three axial directions can be achieved, enabling flexible processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all embodiments. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative efforts.

[0019] Figure 1 is an axonometric view of the clamping table of the present invention Figure 1 ;

[0020] Figure 2 is an axonometric view of the clamping table of the present invention Figure 2 ;

[0021] Figure 3 is an axonometric view of the present invention;

[0022] Figure 4 is an axonometric view of the laser box of the present invention Figure 1 ;

[0023] Figure 5 is an axonometric view of the laser box of the present invention Figure 2 ;

[0024] Figure 6 is an axonometric view of the box body of the present invention Figure 1 ;

[0025] Figure 7 is an axonometric view of the box body of the present invention Figure 2 。

[0026] In the accompanying drawings: 01 - box body, 011 - front side plate, 012 - back plate, 013 - top plate, 014 - left side plate, 015 - right side plate, 016 - bottom plate, 0161 - bottom plate main body, 0162 - circular ring, 0163 - connecting block, 02 - mounting bracket, 021 - first plate, 022 - second plate, 07 - input hole, 08 - output hole, 091 - optical path element, 092 - laser processing head, 093 - positioning assembly, 0931 - industrial camera, 0932 - contact probe, 11 - turntable, 12 - bracket, 121 - horizontal plate, 1211 - first groove, 1212 - mounting hole, 122 - vertical plate, 1221 - through hole, 1222 - second groove, 123 - chamfer, 13 - spindle motor, 14 - fixture, 21 - X-axis movement mechanism, 22 - Y-axis movement mechanism, 23 - Z-axis movement mechanism, 24 - laser assembly. Detailed implementation manners

[0027] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, all the connection / connection relationships mentioned in the text do not refer only to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the present invention can be combined interactively without conflicting with each other.

[0028] Refer to Figures 1 to 7, a laser processing device, comprising a frame, a Y-axis motion mechanism 22, a clamping table, an X-axis motion mechanism 21, a Z-axis motion mechanism 23, a laser component and a laser box; the Y-axis motion mechanism 22 is arranged on the frame; the clamping table is arranged on the Y-axis motion mechanism 22, and the Y-axis motion mechanism 22 drives the clamping table to move back and forth. The clamping table is used for clamping a bar stock. The clamping table drives the bar stock to swing around the C-axis, and the clamping table drives the bar stock to rotate around the A-axis. The length direction of the bar stock is parallel to the A-axis; the X-axis motion mechanism 21 is arranged on the frame; the Z-axis motion mechanism 23 is arranged on the X-axis motion mechanism 21; the laser component is fixed on the frame, and the laser component is used for generating laser; the laser box is used for processing a workpiece. The laser component is optically connected to the laser box. The laser box is arranged on the Z-axis motion mechanism 23, and the Z-axis motion mechanism 23 drives the laser head to move along the Z-axis direction.

[0029] From the above, it can be obtained that the length of the bar stock is parallel to the A-axis. The clamping table drives the bar stock to swing around the C-axis, and the C-axis extends vertically. Thus, the relative position between the bar stock and the laser box can be adjusted, so that the laser box can process a workpiece, such as a workpiece clamped on the clamping table, from multiple angles. When laser milling of the workpiece is required, the workpiece can be rotated at a high speed around the A-axis, thereby realizing the milling of the workpiece. Moreover, different from the traditional AC-axis turntable 11 in which the C-axis drives the workpiece to rotate and the A-axis drives the workpiece to swing, the present invention drives the workpiece to swing around the C-axis, thereby adjusting the position and posture of the workpiece. When the laser box moves downward, interference between the laser box and the cradle of the traditional AC turntable 11 can be avoided, and the processing space is larger.

[0030] Through the settings of the X-axis motion mechanism 21, Y-axis motion mechanism 22, and Z-axis motion mechanism 23, relative motion between the laser box and the clamping table in three axial directions can be achieved, and the processing is flexible.

[0031] The above-mentioned workpiece can be workpieces of different shapes. For example, it can be used to process a workpiece in the shape of a bar stock.

[0032] In some embodiments, the frame includes a base and a gantry. The Y-axis motion mechanism 22 is disposed on the base, the X-axis motion mechanism 21 is disposed on the gantry, and the laser assembly is disposed on the gantry. The laser assembly is disposed on the gantry to avoid disposing the laser assembly on the X-axis motion mechanism 21, Y-axis motion mechanism 22 or Z-axis motion mechanism 23, so as to avoid the X-axis motion mechanism 21, Y-axis motion mechanism 22 or Z-axis motion mechanism 23 needing to drag a larger mass during movement, which affects the machining accuracy. Disposing the Y-axis motion mechanism 22 on the base can directly drive the clamping table to move along the Y-axis direction through the Y-axis motion mechanism 22, and avoid the X-axis motion mechanism 21, Y-axis motion mechanism 22 and Z-axis motion mechanism 23 being disposed together, resulting in a relatively large volume, and effectively reducing the volume.

[0033] In some embodiments, the laser box includes a box body 01. A cavity is provided inside the box body 01. The laser box further includes an optical path element 091 for transmitting laser, a laser processing head 092 for laser processing, a positioning assembly 093 for laser processing positioning, and a mounting frame 02 disposed in the cavity. The laser processing head 092 and the optical path element 091 are optically connected. The mounting frame 02 is fixedly connected to the box body 01. The positioning assembly 093, the laser processing head 092 and the optical path element 091 are respectively fixed on the mounting frame 02. An output hole 08 communicating with the cavity is provided on the side surface of the box body 01. The laser processing head 092 and the positioning assembly 093 extend outwards from the output hole 08. The laser processing head 092 is disposed along the direction of the X-axis motion mechanism 21. An input hole 07 communicating with the cavity is provided on the box body 01. The input hole 07 is used for inputting a laser optical path into the optical path element 091. The optical path element 091 is optically connected to the laser assembly.

[0034] The laser processing head 092 extends along the direction of the X-axis motion mechanism 21. The user can adjust the clamping table so that the bar stock swings around the C-axis until the end face of the bar stock is aligned with the laser processing head 092, thereby realizing axial machining of the bar stock. When radial machining of the bar stock is required, by adjusting the clamping table, the bar stock swings around the C-axis until the side surface of the bar stock is facing the laser processing head 092. The user can also adjust the relative position between the laser processing head 092 and the bar stock according to the machining requirements of different workpieces.

[0035] By disposing the optical path element 091, the laser processing head 092 and the positioning assembly 093 in the cavity provided inside the box body 01, the influence of external dust on the optical path can be effectively reduced. At the same time, through the setting of the output hole 08, the requirements of laser processing and positioning can be met, and the laser optical path can be input into the optical path element 091 through the input hole 07.

[0036] In addition, during actual use, if there are problems with the optical components or the cutting head, it is necessary to check one by one whether there are problems with the components on this optical path, and the efficiency of replacement and maintenance is relatively low. In this embodiment, when it is necessary to replace the optical path component 091, the entire laser box can be replaced, which is more convenient. Moreover, when the laser processing equipment is being installed, the optical path component 091, the laser processing head 092, and the positioning component 093 can be directly installed on the laser box, and then the entire laser box can be installed on the laser processing equipment. The traditional installation method for laser processing equipment is to install multiple components one by one and position them on the machine tool. Therefore, compared with the traditional structure, the installation and disassembly of this embodiment are more convenient, realizing modular installation.

[0037] In the present invention, the X-axis extends in the left-right direction, the Y-axis extends in the front-back direction, the Z-axis extends in the up-down direction, the C-axis extends in the up-down direction, and the A-axis is perpendicular to the C-axis.

[0038] In some embodiments, the box body 01 includes a back plate 012, a left side plate 014, a right side plate 015, a front side plate 011, and a top plate 013. A cavity is formed among the back plate 012, the left side plate 014, the right side plate 015, the front side plate 011, and the top plate 013. The left side plate 014 is fixedly connected to the left side edge of the back plate 012, the right side plate 015 is fixedly connected to the right side edge of the back plate 012, the front side plate 011 is fixedly connected to the front side edges of the left side plate 014 and the right side plate 015, and the top plate 013 is fixedly connected to the top edges of the left side plate 014, the right side plate 015, and the back plate 012. This structure is simple and more convenient to set up.

[0039] In some embodiments, a plurality of left openings are formed in the middle of the left side plate 014, a plurality of right openings are formed in the middle of the right side plate 015, and a plurality of front openings are formed in the front side plate 011. The front openings, the left openings, and the right openings are arranged vertically. This structure is simple and convenient to set up. Through the setting of this structure, the weight of the box body 01 can be effectively reduced, and it is convenient for the user to observe the cavity through the front openings, left openings, and right openings.

[0040] During actual use, the user can also cover some transparent materials on the front openings, left openings, and right openings to further play a role in dust prevention.

[0041] Preferably, the number of left openings, right openings, and front openings corresponds one by one. At the same time, the height positions of all the left openings, right openings, and front openings are aligned with each other.

[0042] In some embodiments, an acute angle is formed between the left side plate 014 and the back plate 012, facing the right side plate 015, and an acute angle is formed between the right side plate 015 and the back plate 012, facing the left side plate 014. By setting such a structure, the area of the front side plate 011 can be effectively reduced, thereby further reducing the weight of the box body 01.

[0043] Optionally, the cross-sections of the left side plate 014, the right side plate 015, the front side plate 011, and the right side plate 015 form an isosceles trapezoid, making the structure more stable.

[0044] In some embodiments, the bottom plate 016 includes: a bottom plate 016 main body and a circular ring 0162; an opening penetrating the bottom plate 016 main body is provided in the middle of the bottom plate 016 main body; the circular ring 0162 is arranged in the middle of the opening, the axis of the circular ring 0162 is arranged vertically, and the circular ring 0162 is fixedly connected to the edge of the opening through a plurality of connecting blocks 0163, and all the connecting blocks 0163 surround the periphery of the circular ring 0162.

[0045] In some embodiments, the left side plate 014 and the right side plate 015 are mirror images of each other. This structure is simple and convenient to set. The left side plate 014 and the right side plate 015 are mirror images of each other, and during production and processing, the left side plate 014 and the right side plate 015 are used as symmetric reference objects for positioning, making the processing more convenient.

[0046] In some embodiments, a plurality of laser processing heads 092 are provided, the laser assembly includes a plurality of laser generators, the laser generators are arranged on the frame, the laser generators are arranged in one-to-one correspondence with the laser heads, and the laser heads are connected to the laser generators through optical paths. Through the one-to-one connection of a plurality of laser generators and a plurality of laser processing heads 092. During use, different types of lasers, such as nanosecond, picosecond, femtosecond, etc., can be generated by different laser generators, and the workpiece can be processed using lasers with different pulse widths, which is very flexible in processing. Moreover, using different laser heads reduces the additional errors caused by switching on the optical path.

[0047] Preferably, each laser processing head 092 is arranged parallel to each other.

[0048] The mounting bracket 02 is disposed within the cavity. The mounting bracket 02 includes a first plate 021 and a second plate 022. The first plate 021 and the second plate 022 are fixedly connected to form an L shape. The first plate 021 is fixedly connected to the back plate 012, and the second plate 022 is fixedly connected to the bottom plate 016. In addition, the first plate 021 is provided with fixing members for connecting the positioning assembly 093 and the optical path element 091. In actual use, one or two laser processing heads 092 can be provided. When there is one laser processing head 092, the laser processing head 092 can be fixed on the first plate 021 or the second plate 022; when there are two laser processing heads 092, one laser processing head 092 is disposed on the first plate 021, and the other laser processing head 092 is disposed on the second plate 022.

[0049] In some embodiments, the positioning assembly 093 includes a contact probe 0932 and an industrial camera 0931. The contact probe 0932 and the industrial camera 0931 are respectively fixed on the mounting bracket 02. In this embodiment, the direction of the contact probe 0932 is the same as the direction of the laser processing head 092, so as to avoid the need for angular calculations due to the different directions of the contact probe 0932 and the laser processing head 092. During the calculation process, decimals may inevitably appear, which may lead to rounding, resulting in greater errors in the calculation.

[0050] In some embodiments, the clamping table includes a turntable 11 disposed on the Y-axis movement mechanism 22, a bracket 12 disposed on the turntable 11, a spindle motor 13 disposed on the bracket 12, and a fixture 14 disposed on the spindle motor 13. The rotation axis of the turntable 11 is disposed along the Z-axis direction. The turntable 11 drives the bracket 12 to rotate around the rotation axis of the turntable 11. The axis of the output shaft of the spindle motor 13 is collinear with the A-axis. The fixture 14 is disposed outside the bracket 12. The fixture 14 is used for clamping a workpiece. The clamping channel is provided on the fixture 14, and the length direction of the clamping channel is parallel to the axis of the output shaft of the spindle motor 13.

[0051] The fixture 14 is disposed outside the bracket 12. When the user processes the workpiece on the clamping channel, there is a larger space for the processing head to move, reducing the possibility of interference between the processing head and the bracket 12. The turntable 11 drives the bracket 12 to rotate around the vertically extending rotation axis, thereby driving the spindle motor 13 to rotate, so that the workpiece on the fixture 14 disposed on the spindle motor 13 rotates around the direction on the C-axis to adjust the position and posture of the workpiece. By driving the workpiece to rotate around the A-axis direction through the spindle motor 13, the position and posture of the workpiece can be further adjusted, and the adjustment is very flexible.

[0052] In some embodiments, the bracket 12 includes a transverse plate 121 and a vertical plate 122. The transverse plate 121 and the vertical plate 122 are fixedly connected. The transverse plate 121 and the vertical plate 122 form an L shape. The turntable 11 is drivingly connected to the transverse plate 121, and the fixing portion of the main shaft motor 13 is fixedly connected to the vertical plate 122. This structure is simple and convenient to set up. Through this L-shaped setting, the possibility of interference between the laser box and the bracket 12 is reduced. At the same time, the stability of the main shaft motor 13 installed on the vertical plate 122 during operation can be ensured.

[0053] In some embodiments, a through hole 1221 is formed in the vertical plate 122. The main shaft motor 13 is inserted through the through hole 1221. The through hole 1221 is fixedly connected to the fixing portion of the main shaft motor 13. The fixture 14 is arranged directly above the transverse plate 121. The output shaft of the main shaft motor 13 passes through the through hole 1221, so that the output shaft of the main shaft motor 13 is arranged directly above the transverse plate, and thus the fixture 14 is arranged directly above the transverse plate. The fixing portion of the main shaft motor 13 is fixedly connected to the vertical plate 122.

[0054] In the prior art, the turntable 11 is generally arranged on the cradle. The cradle is the A axis and the turntable 11 is the C axis. The movement range of the cradle generally cannot reach 180°. The wires are generally directly connected to the A axis and the C axis. However, if the cradle needs to swing more than 180°, for example, if the cradle needs to swing 300°, the wires are very likely to be wound around other components, affecting the processing space.

[0055] If a first groove 1211 is not formed on the bottom surface of the transverse plate 121, but a groove for wire passing is directly formed on the turntable 11, the vibration generated during the operation of the main shaft motor 13 will still be directly transmitted to the turntable 11 through the L-shaped bracket 12. Moreover, when the first groove 1211 is not formed on the transverse plate 121, its mass will be relatively larger. On the one hand, it is not convenient for installation and disassembly; on the other hand, the turntable 11 needs to drive the bracket 12 with a larger mass to rotate, and the moment of inertia of the bracket 12 is larger, and the accuracy is not easy to control.

[0056] After experimental tests, without forming the first groove 1211 and the second groove 1222 on the bracket 12, different orders have different natural frequencies. When the order is 1, the natural frequency of the bracket 12 is 1104.5 HZ; when the order is 2, the natural frequency of the bracket 12 is 1300.6 HZ; when the order is 3, the natural frequency of the bracket 12 is 2013.6 HZ; when the order is 4, the natural frequency of the bracket 12 is 2853.9 HZ; when the order is 5, the natural frequency of the bracket 12 is 3153.9 HZ; when the order is 6, the natural frequency of the bracket 12 is 3203.7 HZ; when the order is 7, the natural frequency of the bracket 12 is 3564.4 HZ.

[0057] When the main shaft motor 13 is working, whether at low power or high power, it is still very easy to resonate with the bracket 12, resulting in obvious overall vibration of the bracket 12 and affecting the accuracy during processing. To avoid this situation, generally, the shape and mass of the bracket 12 can be changed to change the natural frequency. If the mass of the bracket 12 is increased, it will cause the turntable 11 to need to drive a larger mass of the bracket 12 during operation, and the power will increase. Moreover, the material cost of the bracket 12 with a larger mass is relatively higher. If starting from the aspect of reducing mass. A first groove 1211 is opened in the middle of the bottom surface of the transverse plate 121 of the bracket 12, and the first groove 1211 extends horizontally to the edge of the transverse plate 121 close to the vertical plate 122. On the one hand, it is convenient for wiring, and on the other hand, an attempt can be made to change its natural frequency.

[0058] After multiple experiments, in this embodiment, changing the mass of the bracket 12 has a very small impact on the change of its natural frequency, while changing the size of the bracket 12 has a greater impact on its natural frequency.

[0059] In this experiment, the ratio of the width of the transverse plate 121 to the width of the first groove 1211 is 16:6, the ratio of the thickness of the transverse plate 121 to the depth of the first groove 1211 is 5:4, the ratio of the thickness of the transverse plate 121 to the width of the transverse plate 121 is 5:16, and the first groove 1211 is opened in the middle of the transverse plate 121. The widths of the connecting parts of the transverse plate 121 and the vertical plate 122 are the same. At the same time, the specifications, sizes, and materials of the transverse plate 121 and the vertical plate 122 are the same as those of the transverse plate 121 and the vertical plate 122 used in the experiment without opening the first groove 1211 and the second groove 1222 of the above bracket 12.

[0060] After testing, when only the first groove 1211 is opened on the bottom surface of the transverse plate 121, at this time, the ratio of the width of the transverse plate 121 to the width of the first groove 1211 is 16:6, the ratio of the thickness of the transverse plate 121 to the depth of the first groove 1211 is 5:4, and the ratio of the thickness of the transverse plate 121 to the width of the transverse plate 121 is 5:16. When the order is 1, the natural frequency of the bracket 12 is 1106.4 HZ; when the order is 2, the natural frequency of the bracket 12 is 1321.0 HZ; when the order is 3, the natural frequency of the bracket 12 is 2098.3 HZ; when the order is 4, the natural frequency of the bracket 12 is 2854.6 HZ; when the order is 5, the natural frequency of the bracket 12 is 3170.2 HZ; when the order is 6, the natural frequency of the bracket 12 is 3216.9 HZ, and when the order is 7, the natural frequency of the bracket 12 is 3583.8 HZ.

[0061] Under this dimensional parameter, a first groove 1211 is formed on the bottom surface of the bracket 12. Compared with the bracket 12 without the first groove 1211 and the second groove 1222, the natural frequency of the bracket 12 can be relatively increased. However, it is still relatively close to the bracket 12 without the first groove 1211, and the change in the natural frequency of the bracket 12 is still not significant. The radial vibration, axial vibration, and other vibrations in multiple directions of the main shaft motor 13 during operation will still cause resonance on the bracket 12, thereby affecting the machining accuracy. Although there are still the above-mentioned drawbacks, the setting of the first groove 1211 can play a role in wire routing.

[0062] In order to further improve the natural frequency of the bracket 12, further experiments are carried out. In this experiment, only the width of the first groove 1211 is reduced. At this time, the ratio of the width of the transverse plate 121 to the width of the first groove 1211 is 8:2, the ratio of the thickness of the transverse plate 121 to the depth of the first groove 1211 is 5:4, and the ratio of the thickness of the transverse plate 121 to the width of the transverse plate 121 is 5:16.

[0063] When the order is 1, the natural frequency of the bracket 12 is 1208.4 HZ; when the order is 2, the natural frequency of the bracket 12 is 1436.4 HZ; when the order is 3, the natural frequency of the bracket 12 is 2200.0 HZ; when the order is 4, the natural frequency of the bracket 12 is 2921.1 HZ; when the order is 5, the natural frequency of the bracket 12 is 3289.3 HZ; when the order is 6, the natural frequency of the bracket 12 is 3309.9 HZ, and when the order is 7, the natural frequency of the bracket 12 is 3701.2 HZ.

[0064] After multiple experiments, it is found that when the width of the first groove 1211 is smaller or the depth of the first groove 1211 is smaller, that is, when the thickness of the groove wall of the first groove 1211 increases, the natural frequency will increase. However, if the width or depth of the first groove 1211 is too small, it will affect wire routing.

[0065] Further, to solve this problem, the user assumes that a second groove 1222 is formed on the vertical plate 122, so that the first groove 1211 communicates with the second groove 1222; in this way, the groove walls of the first groove 1211 and the first groove 1211 are connected to form an integrated design, which is assumed to improve the natural frequency of the bracket 12. At this time, the ratio of the width of the transverse plate 121 to the width of the first groove 1211 is 8:3, the ratio of the thickness of the transverse plate 121 to the depth of the first groove 1211 is 5:4, and the ratio of the thickness of the transverse plate 121 to the width of the transverse plate 121 is 5:16. Through experiments, it is measured that when the order is 1, the natural frequency of the bracket 12 is 1196.8 HZ; when the order is 2, the natural frequency of the bracket 12 is 2020.3 HZ; when the order is 3, the natural frequency of the bracket 12 is 2395.0 HZ; when the order is 4, the natural frequency of the bracket 12 is 2818.5 HZ; when the order is 5, the natural frequency of the bracket 12 is 3533.2 HZ; when the order is 6, the natural frequency of the bracket 12 is 4148.6 HZ, and when the order is 7, the natural frequency of the bracket 12 is 4808.7 HZ.

[0066] Comparing this embodiment with the embodiment without the first groove 1211 and the second groove 1222, the natural frequency of the bracket 12 can be greatly improved, and the possibility of resonance between the bracket 12 and the motor spindle during operation can be reduced. At the same time, the user can also route wires through the second groove 1222. Although the routing distance is increased, it is more convenient to arrange the wires.

[0067] Thus, in this embodiment, a first groove 1211 is formed on the bottom surface of the transverse plate 121, a second groove 1222 is formed on the vertical plate 122, and the first groove 1211 communicates with the second groove 1222. At the same time, preferably, the first groove 1211 is arranged in the middle of the transverse plate 121, the second groove 1222 is arranged in the middle of the vertical plate 122, and the widths and depths of the first groove 1211 and the second groove 1222 are the same.

[0068] In addition, in this embodiment, a wire-passing channel is formed at the center of the turntable 11, and this channel communicates with the first groove 1211, making wire routing very convenient. At the same time, the center of rotation is the fixed part of the turntable 11, the movable part of the turntable 11 is arranged on the periphery of its channel, and the movable part of the turntable 11 is drivingly connected to the transverse plate 121.

[0069] Preferably, a chamfer 123 is provided at the connection between the transverse plate 121 and the vertical plate 122. Through the setting of this structure, large stress concentration can be avoided at the corner of the vertical plate 122 and the transverse plate 121.

[0070] Preferably, the first groove 1211 is disposed in the middle of the transverse plate 121, the second groove 1222 is disposed in the middle of the vertical plate 122, and the second groove 1222 communicates with the through hole 1221.

[0071] In some embodiments, the fixture 14 includes a collet. This structure is simple and convenient to set up. With the setting of this structure, it is very convenient to clamp workpieces such as bar stock. For example, bar stock can be clamped. When in use, the user can use the collet to clamp the bar stock, so that tools such as drill bits and milling cutters can be processed.

[0072] A plurality of mounting holes 1212 are formed in the transverse plate 121. The mounting holes 1212 are fixedly connected to the movable part of the turntable 11 by screws. The movable part of the turntable 11 surrounds the channel hole. Through the setting of these mounting holes 1212, the movable part of the turntable 11 and the bracket 12 can be fixed, and their connection is stable.

[0073] In the present invention, the X-axis movement mechanism 21 can be any one of an electric screw rod, a servo electric cylinder, and a linear motor. The Y-axis movement mechanism 22 can be any one of an electric screw rod, a servo electric cylinder, and a linear motor. The Z-axis movement mechanism 23 can be any one of an electric screw rod, a servo electric cylinder, and a linear motor.

[0074] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention. These equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A laser processing device, comprising a frame, characterized in that, It further includes: A Y-axis moving mechanism (22) which is arranged on the frame; A clamping table which is arranged on the Y-axis moving mechanism (22). The Y-axis moving mechanism (22) drives the clamping table to move back and forth. The clamping table is used for clamping a bar stock. The clamping table drives the bar stock to swing around the C-axis and rotate around the A-axis. The length direction of the bar stock is parallel to the A-axis; An X-axis moving mechanism (21) which is arranged on the frame; A Z-axis moving mechanism (23) which is arranged on the X-axis moving mechanism (21); A laser component which is fixed on the frame and is used for generating laser; A laser box which is used for processing a workpiece. The laser component is connected to the laser box through an optical path. The laser box is arranged on the Z-axis moving mechanism (23), and the Z-axis moving mechanism (23) drives the laser processing head to move along the Z-axis direction; The clamping table includes a turntable (11) arranged on the Y-axis moving mechanism (22), a bracket (12) arranged on the turntable (11), a spindle motor (13) arranged on the bracket (12), and a fixture (14) arranged on the spindle motor (13). The rotation axis of the turntable (11) is arranged along the Z-axis direction. The turntable (11) drives the bracket (12) to rotate around the rotation axis of the turntable (11). The axis of the output shaft of the spindle motor (13) is collinear with the A-axis. The fixture (14) is arranged outside the bracket (12). The fixture (14) is used for clamping a workpiece. A clamping channel is provided on the fixture (14), and the length direction of the clamping channel is parallel to the axis of the output shaft of the spindle motor (13); The bracket (12) includes a transverse plate (121) and a vertical plate (122). The transverse plate (121) and the vertical plate (122) are fixedly connected. The transverse plate (121) and the vertical plate (122) form an L shape. The turntable (11) is drivingly connected to the transverse plate (121), and the fixed part of the spindle motor (13) is fixedly connected to the vertical plate (122); A first groove (1211) is formed on the bottom surface of the transverse plate (121), and a second groove (1222) is formed on the vertical plate (122). The first groove (1211) communicates with the second groove (1222); The first groove (1211) is arranged in the middle of the transverse plate (121), and the second groove (1222) is arranged in the middle of the vertical plate (122). The width and depth of the first groove (1211) are the same as those of the second groove (1222); The ratio of the width of the transverse plate (121) to the width of the first groove (1211) is 8:

3. The ratio of the thickness of the transverse plate (121) to the depth of the first groove (1211) is 5:

4. The ratio of the thickness of the transverse plate (121) to the width of the transverse plate (121) is 5:

16.

2. The laser processing equipment according to claim 1, wherein The frame includes a base and a gantry. The Y-axis moving mechanism (22) is arranged on the base, the X-axis moving mechanism (21) is arranged on the gantry, and the laser assembly is arranged on the gantry.

3. The laser processing device according to claim 1, wherein, The laser box includes a box body (01). A cavity is arranged inside the box body (01). The laser box further includes an optical path element (091) for transmitting laser, a laser processing head (092) for laser processing, a positioning assembly (093) for laser processing positioning, and a mounting rack (02) arranged inside the cavity. The laser processing head (092) and the optical path element (091) are optically connected. The mounting rack (02) is fixedly connected to the box body (01). The positioning assembly (093), the laser processing head (092), and the optical path element (091) are respectively fixed on the mounting rack (02). An output hole (08) communicating with the cavity is formed on the side surface of the box body (01). The laser processing head (092) and the positioning assembly (093) extend outwards from the output hole (08). The laser processing head (092) is arranged along the direction of the X-axis moving mechanism (21). An input hole (07) communicating with the cavity is formed on the box body (01). The input hole (07) is used for inputting a laser optical path into the optical path element (091). The optical path element (091) is optically connected to the laser assembly.

4. The laser processing device according to claim 3, characterized in that, A plurality of laser processing heads (092) are arranged. The laser assembly includes a plurality of laser generators. The laser generators are arranged on the frame. The laser generators are arranged in one-to-one correspondence with the laser processing heads. The laser processing heads are optically connected to the laser generators.

5. The laser processing device according to claim 3, wherein The positioning assembly (093) includes a contact probe (0932) and an industrial camera (0931). The contact probe (0932) and the industrial camera (0931) are respectively fixed on the mounting rack (02).

6. The laser processing device according to claim 1, characterized in that, A through hole (1221) is formed on the vertical plate (122). The spindle motor (13) is inserted through the through hole (1221). The through hole (1221) is fixedly connected to the fixing part of the spindle motor (13). The fixture (14) is arranged directly above the horizontal plate (121).

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