Laser processing mechanism for manufacturing PCD cutter

Abstract

The utility model relates to the technical field of laser processing, and discloses a laser processing mechanism for manufacturing a PCD (Poly Crystal Diamond) cutter, which comprises a vertical seat, a Z-axis saddle capable of being vertically arranged on the vertical seat in a sliding manner, a Z-axis driving mechanism for driving the Z-axis saddle to vertically move, a B-axis turntable arranged on the Z-axis saddle, and a laser component arranged at the output end of the B-axis turntable, the B-axis rotary table is a water-cooled direct-drive motor, the laser assembly comprises a rotary mounting plate, a box arranged on the upper half portion of the rotary mounting plate, a transmission light path and a laser machining head, the transmission light path and the laser machining head are arranged on the box, and the lower half portion of the rotary mounting plate is in driving connection with the output end of the B-axis rotary table. Due to the use of the water-cooled direct-drive motor, the influence of mechanical vibration and thermal expansion is reduced, and high precision in the laser machining process is ensured, especially for manufacturing of PCD tool cutting edges needing fine control.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, and particularly relates to a laser processing mechanism for manufacturing PCD tools. Background Art

[0002] A PCD tool is a tool made by welding a PCD composite sheet to a carbide or steel tool body. Since the PCD composite sheet combines the high hardness, wear resistance, low friction coefficient and strength of single crystal diamond with the high flexural strength of tungsten carbide carbide, the tungsten carbide carbide layer of the composite sheet provides mechanical support for the diamond layer, increasing its flexural strength. At the same time, the carbide layer is easy to weld, making it easy to manufacture finished tools, and is widely used in fields such as automotive, aerospace, electronics and wood processing.

[0003] The traditional method for manufacturing the edge of a PCD tool is to use grinding wheels for grinding and electrical discharge machining. The grinding wheels used in the manufacturing of the edge of PCD tools are relatively expensive, and the PCD material has a high hardness, making grinding difficult, undoubtedly bringing high costs to the processing of PCD tools. Moreover, the quality of the edge of the PCD tool processed by electrical discharge machining is poor, and the situation of severe chipping is serious. Therefore, the manufacturing of the edge of PCD tools tends to use laser cutting for processing. In order to enable the laser cutting head to rotate flexibly to achieve more free processing, the laser assembly where the laser cutting head is located will be integrally installed on the B-axis turntable. However, a large amount of heat radiation will be generated during the laser processing process, which is likely to cause thermal expansion of the adjacent B-axis turntable, thereby affecting the processing accuracy.

[0004] It can be seen that the existing technology still needs to be improved. Summary of the Utility Model

[0005] In view of the deficiencies of the above-mentioned existing technology, the purpose of the present utility model is to provide a laser processing mechanism for manufacturing PCD tools, and solve the technical problem that the B-axis turntable is affected by excessive thermal expansion, thereby affecting the processing accuracy.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A laser processing mechanism for manufacturing PCD tools, including a vertical seat, a Z-axis saddle slidably arranged vertically on the vertical seat, a Z-axis driving mechanism for driving the vertical movement of the Z-axis saddle, a B-axis turntable arranged on the Z-axis saddle, and a laser assembly arranged at the output end of the B-axis turntable. The B-axis turntable is a water-cooled direct drive motor. The laser assembly includes a rotating mounting plate, a box body arranged on the upper half of the rotating mounting plate, and a transmission optical path and a laser processing head arranged on the box body. The lower half of the rotating mounting plate is drivingly connected to the output end of the B-axis turntable.

[0008] As a further improvement of the above technical solution, a heat insulation baffle is provided on the front end face of the lower half of the rotating mounting plate.

[0009] As a further improvement of the above technical solution, an arc-shaped protective shell surrounding the B-axis turntable is provided on the back of the lower half of the rotating mounting plate.

[0010] As a further improvement of the above technical solution, the B-axis turntable includes a base shaft seat, a stator assembly fixedly sleeved on the base shaft seat, and a rotor assembly arranged outside the stator assembly. A cooling water channel is provided inside the base shaft seat, and the water inlet end and water outlet end of the cooling water channel are arranged at the tail end of the base shaft seat and are provided with a first joint.

[0011] As a further improvement of the above technical solution, two vertically extending Z-axis guide rails are provided on the vertical seat, and the Z-axis saddle is slidably connected to the Z-axis guide rails through Z-axis sliders; the Z-axis driving mechanism is a linear motor, the stator of the linear motor is fixed on the vertical seat, and the mover of the linear motor is connected to the back of the Z-axis saddle through a wire routing box.

[0012] As a further improvement of the above technical solution, a water supply pipe and a return pipe are provided in the wire routing box, and second joints are provided at the ends of the water supply pipe and the return pipe, and the second joints are connected to the first joint through water pipes.

[0013] As a further improvement of the above technical solution, a bracket is provided at the top of the vertical seat, a load-reducing cylinder is provided vertically downward on the bracket, and the output end of the load-reducing cylinder is connected to the top of the Z-axis saddle.

[0014] As a further improvement of the above technical solution, the bottom of the vertical seat is arranged on the X-axis saddle, the X-axis saddle is slidably arranged on the bed body, and the X-axis saddle moves left and right under the drive of the X-axis driving mechanism.

[0015] As a further improvement of the above technical solution, the laser processing head emits laser downward to achieve processing, and a probe and a blow pipe are installed on the box body.

[0016] Advantages of the present utility model: The laser processing mechanism provided by the present utility model is used for processing PCD tools. Compared with traditional grinding wheel grinding and electric discharge machining methods, laser processing reduces the dependence on expensive grinding wheels for edge grinding, reduces the processing cost; the use of a water-cooled direct drive motor reduces the influence of mechanical vibration and thermal expansion, ensuring high precision during the laser processing process, especially for the manufacture of PCD tool edges that require fine control. Description of the Drawings

[0017] Figure 1 It is a perspective view of the laser processing mechanism provided by the present utility model.

[0018] Figure 2 It is a perspective view of the B-axis turntable.

[0019] Figure 3 It is a sectional view of the B-axis turntable.

[0020] Description of main component symbols: 1 - vertical base, 10 - bed, 2 - Z-axis saddle, 3 - Z-axis drive mechanism, 30 - wire duct, 4 - B-axis turntable, 41 - base shaft housing, 42 - stator assembly, 43 - rotor assembly, 44 - cooling water path, 45 - first joint, 46 - terminal box, 5 - laser assembly, 51 - rotating mounting plate, 52 - box body, 53 - laser processing head, 54 - heat insulation baffle, 55 - arc-shaped protective shell, 71 - bracket, 72 - load-reducing cylinder, 81 - X-axis saddle, 82 - X-axis drive mechanism, 91 - probe, 92 - air blowing pipe. Specific implementation mode

[0021] The present utility model provides a laser processing mechanism for manufacturing PCD tools. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the following further details the present utility model with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present utility model and are not used to limit the protection scope of the present utility model.

[0022] Please refer to Figures 1-3 , the present utility model provides a laser processing mechanism for manufacturing PCD tools, including a vertical base 1, a Z-axis saddle 2 slidably arranged vertically on the vertical base 1, a Z-axis drive mechanism 3 for driving the Z-axis saddle 2 to move vertically, a B-axis turntable 4 arranged on the Z-axis saddle 2, and a laser assembly 5 arranged at the output end of the B-axis turntable 4. The B-axis turntable 4 is a water-cooled direct drive motor. The laser assembly 5 includes a rotating mounting plate 51, a box body 52 arranged in the upper half of the rotating mounting plate 51, and a transmission optical path and a laser processing head 53 arranged on the box body 52. The lower half of the rotating mounting plate 51 is drivingly connected to the output end of the B-axis turntable 4.

[0023] Under the action of the B-axis turntable 4 and the Z-axis drive mechanism 3, the laser processing head 53 can not only flexibly adjust its height, but also rotate to adjust the processing angle, enabling the laser processing head 53 to be flexibly adjusted in multiple directions, improving the processing flexibility and efficiency. The laser beam is precisely focused on the cutting edge of the PCD tool through the transmission optical path inside the box body 52, achieving high-precision laser cutting. By using a water-cooled direct-drive motor as the B-axis turntable 4, stable and precise rotational power can be provided. This design can effectively reduce the mechanical vibration and energy loss caused by traditional drive methods, ensuring the high precision of the laser processing head 53 during complex curved surface processing. At the same time, the water-cooling system can quickly remove a large amount of heat radiation generated during the laser processing process, preventing the decline in processing accuracy caused by thermal expansion. Especially during long-term continuous operation, it can maintain the thermal stability of the system.

[0024] Preferably, a heat insulation baffle 54 is provided on the front end face of the lower half of the rotation mounting plate 51. The presence of the heat insulation baffle 54 effectively isolates the high temperature generated during the laser processing from directly transferring to the rotation mounting plate 51 and its adjacent components, especially the B-axis turntable 4, reducing the influence of heat conduction and heat radiation on precision components, and further protecting the B-axis turntable 4 from precision loss caused by thermal expansion.

[0025] The heat insulation baffle 54 can specifically adopt composite heat insulation materials (such as glass fiber, ceramic fiber, carbon fiber, etc.). The composite heat insulation materials can not only withstand high temperatures, but also have good heat insulation performance, and at the same time have a certain structural strength. It can also adopt ceramic materials (such as alumina ceramics, silicon nitride ceramics, etc.) with very excellent high-temperature resistance and heat insulation performance, which can withstand extremely high temperatures, have good chemical stability, are not easily corroded, and are suitable for use in high-temperature environments such as laser processing.

[0026] Furthermore, an arc-shaped protective shell 55 surrounding the B-axis turntable 4 is provided on the back of the lower half of the rotation mounting plate 51. The arc-shaped protective shell 55 and the heat insulation baffle 54 are combined to form a double thermal barrier, effectively controlling the diffusion path of heat energy and reducing the influence of heat radiation on the B-axis turntable 4 and its nearby areas. At the same time, the arc-shaped design is conducive to forming natural ventilation, which helps with heat exchange and heat dissipation inside the system.

[0027] In this embodiment, the B-axis turntable 4 includes a base shaft housing 41, a stator assembly 42 fixedly sleeved on the base shaft housing 41, and a rotor assembly 43 disposed outside the stator assembly 42. A cooling water channel 44 is provided inside the base shaft housing 41. The water inlet end and the water outlet end of the cooling water channel 44 are provided at the tail end of the base shaft housing 41 and are provided with a first joint 45. The cooling water channel 44 is directly integrated inside the base shaft housing 41, which can quickly and effectively take away the heat generated during the operation of the motor, preventing performance degradation or damage caused by overheating. The high-efficiency heat exchange capacity of the water cooling system can more stably control the motor temperature compared with air cooling or other cooling methods, reduce the vibration caused by thermal expansion and contraction, improve the machining accuracy, and ensure that the motor can maintain the best working state under high load.

[0028] Preferably, two vertically extending Z-axis guide rails are provided on the vertical seat 1. The Z-axis saddle 2 is slidably connected to the Z-axis guide rails through Z-axis sliders to ensure smooth and stable movement of the Z-axis saddle 2. Since the linear motor can achieve direct drive and has the advantages of a thin and light structure, high transmission efficiency, safety and reliability, and long service life, the Z-axis drive mechanism 3 is a linear motor. The stator of the linear motor is fixed on the vertical seat 1, and the mover of the linear motor is connected to the back of the Z-axis saddle 2 through a wire duct 30, that is, the mover is embedded in the wire duct 30, making the structure compact.

[0029] It can be understood that the wire duct 30 not only has a water supply pipe and a return pipe, but also has a power supply wire, and the power supply wire is connected to a terminal box 46 at the tail end of the B-axis turntable 4. Second joints are provided at the ends of the water supply pipe and the return pipe, and the second joints are connected to the first joint 45 through water pipes, thereby realizing the water supply and return cooling of the B-axis turntable 4.

[0030] Furthermore, a bracket 71 is provided at the top of the vertical seat 1, and a load-reducing cylinder 72 is provided vertically downward on the bracket 71. The output end of the load-reducing cylinder 72 is connected to the top of the Z-axis saddle 2. The load-reducing cylinder 72 can provide a corresponding reverse force when the Z-axis saddle 2 moves up and down, thereby reducing the load on the linear motor that drives the Z-axis saddle 2 to move up and down, reducing the power requirement of the linear motor, and improving the service life of the linear motor.

[0031] In order to further improve the machining flexibility, the bottom of the vertical seat 1 is disposed on an X-axis saddle 81, and the X-axis saddle 81 is slidably disposed on the machine bed 10. The X-axis saddle 81 moves left and right under the drive of an X-axis drive mechanism 82, and the X-axis drive mechanism 82 can be a linear motor or a linear module structure. The introduction of the X-axis saddle 81 enables the laser processing mechanism to have the ability to move in the X-axis direction, greatly enhancing the machining range and flexibility. Precise positioning can be obtained through the adjustment of the X-axis, improving the adaptability of the equipment to different machining tasks.

[0032] Preferably, the laser processing head 53 emits laser downward to achieve processing. A probe 91 and a blow pipe 92 are installed on the box body 52. The use of the probe 91 can monitor the actual position of the workpiece surface in real time, compare it with the preset processing path, correct the deviation in time, ensure that the laser processing head 53 processes accurately according to the predetermined trajectory, significantly improve the processing accuracy, especially for the manufacture of the PCD tool edge that requires highly precise control. The blow pipe 92 blows inert gas during the laser processing, which can remove the soot and slag in the processing area, prevent them from affecting the processing quality and subsequent processing. At the same time, the inert gas can also play a cooling role, protect the workpiece surface from thermal damage, speed up the processing speed, and improve the production efficiency.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be a direct connection, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions and the inventive concept of the present invention, and all such changes or replacements should belong to the protection scope of the present invention.

Claims

1. A laser processing mechanism for manufacturing PCD tools, characterized in that: It includes a stand, a Z-axis saddle that can be vertically slidably arranged on the stand, a Z-axis driving mechanism for driving the Z-axis saddle to move vertically, a B-axis turntable arranged on the Z-axis saddle, and a laser component arranged on the output end of the B-axis turntable. The B-axis turntable is a water-cooled direct-drive motor. The laser component includes a rotating mounting plate, a box body arranged on the upper half of the rotating mounting plate, and a transmission optical path and a laser processing head arranged on the box body. The lower half of the rotating mounting plate is drivingly connected to the output end of the B-axis turntable.

2. A laser processing mechanism for manufacturing PCD tools according to claim 1, characterized in that: A heat insulation baffle is arranged on the front end surface of the lower half of the rotating mounting plate.

3. A laser processing mechanism for manufacturing PCD cutting tools according to claim 1, characterized in that: An arc-shaped protective shell surrounding the B-axis turntable is provided on the back side of the lower half of the rotating mounting plate.

4. A laser processing mechanism for manufacturing PCD cutting tools according to claim 1, characterized in that: The B-axis turntable includes a base shaft base, a stator assembly fixedly sleeved on the base shaft base, and a rotor assembly arranged outside the stator assembly. A cooling water circuit is arranged inside the base shaft base, and the water inlet and outlet ends of the cooling water circuit are provided with the tail end of the base shaft base and a first joint.

5. A laser processing mechanism for manufacturing PCD cutting tools according to claim 4, characterized in that: The stand is provided with two vertically extending Z-axis guide rails, and the Z-axis saddle is slidably connected to the Z-axis guide rails via a Z-axis slider; the Z-axis driving mechanism is a linear motor, the stator of the linear motor is fixed on the stand, and the mover of the linear motor is connected to the back of the Z-axis saddle via a wiring box.

6. A laser processing mechanism for manufacturing PCD cutting tools according to claim 5, characterized in that: A water supply pipe and a return pipe are arranged in the wiring box, and the ends of the water supply pipe and the return pipe are both provided with a second joint, and the second joint is connected to the first joint through a water pipe.

7. The laser processing mechanism for manufacturing PCD cutting tools according to claim 5, characterized in that: A bracket is provided on the top of the stand, and a load-reducing cylinder is provided on the bracket and is vertically downwardly directed. The output end of the load-reducing cylinder is connected to the top of the Z-axis saddle.

8. The laser processing mechanism for manufacturing PCD cutting tools according to claim 1, characterized in that: The bottom of the stand is arranged on an X-axis slide saddle, and the X-axis slide saddle is slidably arranged on the bed. The X-axis slide saddle moves left and right under the driving of the X-axis driving mechanism.

9. The laser processing mechanism for manufacturing PCD cutting tools according to claim 1, characterized in that: The laser processing head emits laser downwards to realize processing, and a probe and an air blowing pipe are installed on the box.

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