CN203636514U - Ultra-precise grinding/polishing platform for regular diamond tool head - Google Patents

Abstract

The utility model relates to an ultra-precise grinding/polishing platform for a regular diamond tool head, and belongs to the field of precise and ultra-precise machining. The ultra-precise grinding/polishing platform comprises a platform supporting device, a three-freedom-degree device, a force sensor, an acoustic emission sensor, and a tool head clamping unit, wherein the three-freedom-degree device provides three degrees of freedom of motion including Z-axis movement, rotation around the Z axis and rotation around a Y axis, and in the meantime provides loading force for machining; the force sensor detects the acting force subject to a workpiece (the diamond tool head) in the machining process; the acoustic emission sensor detects the dynamic procedure of material removal in the machining process. The ultra-precise grinding/polishing platform can be applied to repairing and finishing the regular diamond tool head, and has the advantages of compact structure, simplicity in operation, high efficiency, strong applicability, and the like. The platform further can perform precise machining to the workpiece through adjustment of multi-degree of freedom, and controls the machining process through the sensor, so as to ensure the flatness of the workpiece finished surface, and improve the machining efficiency and the surface quality of the workpiece.

Description

Ultra-precision grinding/polishing processing platform for regular diamond tool heads

technical field

The utility model relates to the field of precision and ultra-precision processing, and is oriented to an ultra-precision grinding/polishing processing platform for regular diamond tool heads, aiming at the characteristics of diamond polygons and regular geometric shapes, and realizes ultra-precision grinding/polishing processing for regular diamond tool heads.

Background technique

The most common methods of processing diamonds (diamonds) are traditional rounding, sawing and polishing. Diamonds are machined from other diamonds or diamond powder adhering to the disc - some of the diamonds become diamond powder during machining. Although the weight of the diamond is reduced, its value increases because of the changed shape after polishing. Of course, the clarity of diamonds has also improved. In addition to traditional machining methods, laser has become a very important segmentation method today. Compared with traditional machinery, the initial investment of laser processing is large, and the loss of materials is also relatively large. But diamonds can be cut into many new shapes. However, laser also has its great advantages. It is not necessary to consider the growth direction of diamond crystals when cleaving diamonds, and the mechanical properties of diamonds are also irrelevant. This allows one to split polycrystalline diamond, which was almost impossible before. Due to the risks involved in diamond splitting, especially for large diamonds, traditional splitting is rarely used.

Grinding and polishing are processing technologies that are applied and emerged almost at the same time. Grinding can improve the shape and position accuracy of the workpiece, while polishing can reduce the surface roughness, etc., but it cannot improve the shape and position accuracy of the workpiece. Polishing usually uses very fine particles, so that the force between the abrasive and the workpiece will not reach the destructive force, and no cracks will occur. The particle size of the fine abrasive grains is generally below 1 μm, and polishing is performed under the action of finer abrasive grains to obtain a higher-quality surface. Generally, nanometer-scale surface roughness and surface damage can be achieved.

With the development of science and technology, people's demand and requirements for product performance are more stringent, not only in terms of quality, but also in terms of efficiency, especially in the fields of defense industry, microelectronics technology, aerospace, precision instruments and meters. The precision and quality requirements of devices are getting higher and higher. Diamond tool heads play an extremely important role in both processing and production as well as scientific research. For example, diamonds are used in tools for tight cutting and nano-indentation/scratching. And "the hardest material in the world" also makes diamond widely used in various fields of human beings. However, it is precisely because of its advantages that it also brings processing difficulties, especially the ultra-precision processing of diamond is still in the stage of scientific exploration. . Therefore, for diamond bodies with regular geometric shapes, it is very necessary to design an ultra-precision grinding/polishing processing platform that can improve processing efficiency and processing accuracy.

Contents of the invention

The purpose of this utility model is to provide an ultra-precision grinding/polishing processing platform for regular diamond tool heads, which solves the above-mentioned problems in the prior art, and has the advantages of compact structure, simple operation, high efficiency, and strong applicability; Improve the flatness of the workpiece processing surface, improve the processing efficiency and surface quality of the workpiece.

Above-mentioned purpose of the utility model is realized through the following technical solutions:

The ultra-precision grinding/polishing processing platform for regular diamond tool heads includes a platform support device, a three-degree-of-freedom device, a force sensor and an acoustic emission sensor control unit, and a tool head holding unit. The three-degree-of-freedom device provides Z-axis rotation, Y Axis rotation, Z-axis movement, the three-degree-of-freedom device provides the required processing position and the downward load force of the workpiece; the force sensor and the acoustic emission sensor control unit include a force sensor 13 and an acoustic emission sensor 25, connected by the connecting ring 12, The flange 14 and the tool head holding unit 11 are fixed, and the force sensor 13 measures the force on the workpiece during processing through the connecting ring 12 and the flange 14; the acoustic emission sensor 25 is in contact with the diamond tool head 10 to monitor material removal during processing Dynamic process: the force sensor and the acoustic emission sensor control unit are connected to the three-degree-of-freedom transmission device and the tool head holding unit.

The three-degree-of-freedom device is composed of Yaskawa AC servo rotating motor 15, pulse control digital steering gear 16, and Yaskawa AC servo linear motor 19. The Z-axis movement is provided by Yaskawa AC servo linear motor 19, and is fixed on the connection by fastening screw I20. On board 1, the motor has a self-locking and self-contained encoder, which can realize the detection of the rotational speed and form a semi-closed-loop control. The output shaft of the motor, the ball screw 23 and the coupling 21 are connected through the fastening screw II 22, and the ball screw 23 is connected with the lead screw nut 18, the lead screw nut 18 is connected with the slider 7 through the hexagon socket head screw II 17, the Z-axis displacement is generated along the guide rail 6; the Y-axis rotation is provided by the pulse control digital steering gear 16, and the digital steering gear is tightened by The screw is fixed on the slider 7, the steering gear is controlled by digital pulse, and the steering gear rotates around the Y axis with a single pulse 1 division as a unit. The steering gear has a self-locking function to realize the angle adjustment of the surface to be processed; the Z axis rotation is controlled by Yaskawa AC servo rotating motor 15 is provided, and it is fixed on the steering gear by fastening screws. Yaskawa AC servo rotating motor has self-locking and built-in encoder, which can realize the detection of rotational speed, form a semi-closed-loop control, and strictly output the required angle .

The force sensor 13 is connected to the flange 14 and the connecting ring 12, and the collet 11 is screwed to the connecting ring 12. At the same time, the acoustic emission sensor 25 is in contact with the diamond tool head 10 by adjusting the positions of both.

The diamond chuck 11 of the tool bit clamping unit is screwed to the connecting ring 12, and the diamond tool bit 10 is fixed by the fastening screw III24.

The platform supporting device is composed of a polishing table 8, a column 2, and a support block 4. The polishing disc 9 is controlled by a closed-loop control circuit for grinding/polishing speed and is fixed at the center of the polishing table 8. The support block 4 is fixed on the column by fastening bolts 5. 2, the connection plate 1 is fixed on the support block by the hexagon socket head screw I3.

The beneficial effect of the utility model is that: compared with the existing diamond material processing technology, the utility model has the advantages of compact structure, simple operation, high efficiency, strong applicability, etc.; at the same time, it can ensure the flatness of the workpiece processing surface and improve the Processing efficiency and surface quality; at the same time, detect the time when the workpiece processing is finished, and can stop the grinding/polishing process in time to save processing costs and processing time. It has the advantages of less investment, quick results, and high benefits. It has broad application prospects and strong practicality.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic examples and descriptions of the utility model are used to explain the utility model and do not constitute improper limitations to the utility model.

Fig. 1 is a schematic diagram of an axonometric view of an assembly of the present utility model;

Fig. 2 is a schematic diagram of a three-degree-of-freedom device of the present invention;

Fig. 3 is a sectional view of the detection control of the present invention.

In the figure: 1. connecting plate; 2. column; 3. hexagon socket head cap screw Ⅰ; 4. support block; 5. fastening bolt; 6. guide rail; 7, slider; 8. polishing table; 9. polishing disc; 10 .Diamond tool head; 11. Diamond chuck; 12. Connecting ring; 13. Force sensor; 14. Flange; 15. Yaskawa AC servo rotating motor; 16. Pulse control digital steering gear; 17. Hexagon socket screw II; 18 . Lead screw nut; 19. Yaskawa AC servo linear motor; 20. Fastening screw Ⅰ; 21. Coupling; 22. Fastening screw Ⅱ; 23. Ball screw; 24. Fastening screw Ⅲ; 25. Acoustic emission sensor.

Detailed ways

Further illustrate the detailed content of the utility model and its specific implementation below in conjunction with accompanying drawing.

Referring to Fig. 1 to Fig. 3, the ultra-precision grinding/polishing processing platform for regular diamond tool heads of the present utility model is designed on the basis of existing diamond grinding/polishing technology, because the main part of the platform is three The space occupied by the degree of freedom device, the force sensor and the acoustic emission sensor control unit, and the tool head holding unit is small, and the polishing disc 9 is rotated during processing to process the workpiece, so the remaining corners of the polishing table can be rotated according to processing needs. Install this platform separately to realize multi-station processing, which can improve processing and production efficiency; if single-station processing can also change the polishing disc to a suitable size, so as to reduce processing space and reduce processing costs. In addition, the requirement of the design scheme of the present invention for the diamond tool head to be processed is: the angle between the normal direction and the surface to be processed is not less than 45°, if it is less than 45°, the collet 11 will interfere with the polishing disc 9.

The utility model-oriented ultra-precision grinding/polishing processing platform for regular diamond tool heads includes a platform support device, a three-degree-of-freedom device, a force sensor and an acoustic emission sensor control unit, and a tool head holding unit. The three-degree-of-freedom devices respectively provide Z Axis rotation, Y-axis rotation, Z-axis movement, the three-degree-of-freedom device provides the required processing position and the downward load force of the workpiece; the force sensor and acoustic emission sensor control unit includes a force sensor 13 and an acoustic emission sensor 25. The connecting ring 12, the flange 14 and the tool head holding unit 11 are fixed, and the force sensor 13 measures the force on the workpiece during the processing through the connecting ring 12 and the flange 14; the acoustic emission sensor 25 is in contact with the diamond tool head 10 to monitor The dynamic process of material removal during processing; the force sensor and the acoustic emission sensor control unit are connected with the three-degree-of-freedom transmission device and the tool head holding unit.

The three-degree-of-freedom device is composed of Yaskawa AC servo rotating motor 15, pulse control digital steering gear 16, and Yaskawa AC servo linear motor 19. The Z-axis movement is provided by Yaskawa AC servo linear motor 19, and is fixed on the connection by fastening screw I20. On board 1, the motor has a self-locking and self-contained encoder, which can realize the detection of the rotational speed and form a semi-closed-loop control. The output shaft of the motor, the ball screw 23 and the coupling 21 are connected through the fastening screw II 22, and the ball screw 23 is connected with the lead screw nut 18, the lead screw nut 18 is connected with the slider 7 through the hexagon socket head screw II 17, the Z-axis displacement is generated along the guide rail 6; the Y-axis rotation is provided by the pulse control digital steering gear 16, and the digital steering gear is tightened by The screw is fixed on the slider 7, the steering gear is controlled by digital pulse, and the steering gear rotates around the Y axis with a single pulse 1 division as a unit. The steering gear has a self-locking function to realize the angle adjustment of the surface to be processed; the Z axis rotation is controlled by Yaskawa AC servo rotating motor 15 is provided, and it is fixed on the steering gear by fastening screws. Yaskawa AC servo rotating motor has self-locking and built-in encoder, which can realize the detection of rotational speed, form a semi-closed-loop control, and strictly output the required angle .

The force sensor 13 is connected to the flange 14 and the connecting ring 12, and the collet 11 is screwed to the connecting ring 12. At the same time, the acoustic emission sensor 25 is in contact with the diamond tool head 10 by adjusting the positions of both.

The diamond chuck 11 of the tool bit clamping unit is screwed to the connecting ring 12, and the diamond tool bit 10 is fixed by the fastening screw III24.

The platform supporting device is composed of a polishing table 8, a column 2, and a support block 4. The polishing disc 9 is controlled by a closed-loop control circuit for grinding/polishing speed and is fixed at the center of the polishing table 8. The support block 4 is fixed on the column by fastening bolts 5. 2, the connection plate 1 is fixed on the support block by the hexagon socket head screw I3.

The above descriptions are only preferred examples of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made to the utility model shall be included in the protection scope of the utility model.

Claims (5)

1. rule-oriented diamond tool head ultraprecision grinding/polishing platform, comprising that platform supporting device, Three Degree Of Freedom device, power sensor and calibrate AE sensor control module, tool heads add holds unit, it is characterized in that: described Three Degree Of Freedom device provides respectively Z axis rotation, Y-axis rotation, Z axis to move, and Three Degree Of Freedom device provides the needed Working position of workpiece and downward loading force; Described power sensor and calibrate AE sensor control module comprise power sensor (13) and calibrate AE sensor (25), added by connecting ring (12), flange (14) and tool heads that to hold unit (11) fixing, power sensor (13) is by connecting ring (12), flange (14) measuring workpieces suffered active force in process; Calibrate AE sensor (25) contacts with diamond tool head (10), and monitoring adds material removal in man-hour dynamic process; Described power sensor is connected Three Degree Of Freedom transmission device and tool heads and adds and hold unit with calibrate AE sensor control module.

2. rule-oriented diamond tool head ultraprecision grinding/polishing platform according to claim 1, it is characterized in that: described Three Degree Of Freedom device is by pacifying river AC servo electric rotating machine (15), pulse control figure steering wheel (16), peace river AC servo linear electric motors (19) composition, Z axis moves by peace river AC servo linear electric motors (19) and provides, be fixed on connecting plate (1) by trip bolt I (20), motor has self-locking and carries encoder, can realize the detection to rotating speed, form half-closed loop control, the output shaft of motor, ball-screw (23) is connected by trip bolt II (22) with shaft coupling (21), ball-screw (23) is connected with feed screw nut (18), feed screw nut (18) is connected by soket head cap screw II (17) with slide block (7), Z axis displacement produces along guide rail (6), Y-axis rotation is provided by pulse control figure steering wheel (16), it is upper that digital rudder controller is fixed on slide block (7) by trip bolt, and steering wheel is by digit pulse control, and steering wheel rotates around Y-axis take pulse 1 calibration as unit, steering wheel has auto-lock function, realizes the angle adjustment of to be processed, Z axis rotation is provided by peace river AC servo electric rotating machine (15), and be fixed on steering wheel by trip bolt, peace river AC servo electric rotating machine has self-locking and carries encoder, can realize the detection to rotating speed, form half-closed loop control, the angle that strict output needs.

3. rule-oriented diamond tool head ultraprecision grinding/polishing platform according to claim 1, it is characterized in that: described power sensor (13) is connected with flange (14), connecting ring (12), chuck (11) is threaded with connecting ring (12), by the position of adjusting both, calibrate AE sensor (25) is contacted with diamond tool head (10) simultaneously.

4. rule-oriented diamond tool head ultraprecision grinding/polishing platform according to claim 1, it is characterized in that: described tool heads adds the diamond chuck (11) of holding unit and is threaded with connecting ring (12), and by trip bolt III (24), diamond tool head (10) is fixing.

5. rule-oriented diamond tool head ultraprecision grinding/polishing platform according to claim 1, it is characterized in that: described platform supporting device is made up of polishing block (8), column (2), back-up block (4), polishing disk (9) is by closed control circuit control grinding/polishing rotating speed and be fixed on polishing block (8) center, it is upper that back-up block (4) is fixed on column (2) by fastening bolt (5), and connecting plate (1) is fixed on back-up block by soket head cap screw I (3).

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