WO2022222280A1

WO2022222280A1 - Rotary ultrasonic grinding machine tool and application

Info

Publication number: WO2022222280A1
Application number: PCT/CN2021/104863
Authority: WO
Inventors: 秦慧斌; 冯毅; 周瑞峰; 马彪; 庞学慧; 王宗彦; 辛佳毅; 郭纪纪
Original assignee: 中北大学; 太原工具厂有限责任公司
Priority date: 2021-04-22
Filing date: 2021-07-07
Publication date: 2022-10-27
Also published as: CN113118882A

Abstract

A rotary ultrasonic grinding machine tool, comprising a rotary ultrasonic grinding spindle (1), an ultrasonic power transmission device (2), a spindle clamping and lifting device (3), and a part clamping and feeding device (4), wherein the rotary ultrasonic grinding spindle (1) comprises a grinding wheel (101) mounted at an output end of an amplitude transformer (103); a mandrel at a large end of the amplitude transformer (103) extends into a hollow sleeve (106) to be connected to an output end face of a transducer (107); the transducer (107) is connected to an inner surface of the hollow sleeve (106) in a transition fitting manner by means of a positioning flange (109); the hollow sleeve (106) is mounted in a supporting base (102); and a tail end of the hollow sleeve (106) is connected to an electric spindle (112) by means of a coupler (111). Further comprised is a method for using the rotary ultrasonic grinding machine tool. The rotary ultrasonic grinding spindle is directly driven by the electric spindle, thereby improving the grinding efficiency, reducing the grinding force and grinding heat, and improving the part machining quality.

Description

A rotary ultrasonic grinding machine tool and its application

technical field

The invention belongs to the technical field of ultrasonic precision machining of hard and brittle materials, in particular to a rotary ultrasonic grinding machine tool and its application.

Background technique

Hard and brittle materials such as metal matrix composites, ceramic materials, cemented carbides, and semiconductor materials are widely used in aerospace, biomanufacturing, microelectronics manufacturing and other fields because of their excellent mechanical, physical and chemical properties. However, hard and brittle materials are difficult-to-machine materials, and there are problems such as poor machining performance, low machining efficiency, poor machining surface quality, easy cracks and edge chipping, etc., resulting in high machining costs, which is not conducive to the popularization and use of these materials.

Rotary ultrasonic grinding technology is an effective composite finishing process for hard and brittle materials. Compared with traditional grinding, it has the advantages of reducing grinding force and grinding heat, reducing processing damage, improving processing efficiency and precision, and prolonging the life of abrasive tools. As a special energy-carrying machining method, rotary ultrasonic grinding has opened up a new way for precision machining of hard, brittle and difficult-to-machine material parts, and has broad application prospects.

Rotary ultrasonic grinding technology equipment is the key to the rotary ultrasonic grinding process system, and its performance directly affects the processing quality and performance of hard and brittle materials. In the design of ultrasonic grinding tool holders, small grinding wheels or grinding heads are mostly used, which restricts the improvement of ultrasonic grinding efficiency. Ultrasonic grinding tools for hard and brittle materials Parallel grinding wheels, cup grinding wheels, and internal grinding wheels are large-loaded tools. At present, the design of such a large-load rotary ultrasonic machining resonance system lacks systematic and effective theoretical methods, and lacks large-scale production and application. Loaded rotating ultrasonic grinding wheel resonant spindle and rotating ultrasonic grinding machine restrict the popularization and application of ultrasonic grinding technology for hard, brittle and difficult-to-machine materials.

The invention patent with the application number ZL201810387090.2 proposed an ultrasonic vibration grinding machine in 2018, which consists of a base, a worktable, a workpiece clamping mechanism and an ultrasonic vibration grinding mechanism. The grinding wheel drive motor is connected with the grinding wheel and is jointly arranged on the sliding plate. The ultrasonic motor drives the eccentric shaft resonance box as an ultrasonic vibration generating device, which excites the sliding plate to vibrate, and finally drives the grinding wheel to realize ultrasonic vibration grinding. However, the ultrasonic excitation route of the grinding wheel is long and the load is large, and the actual production application is difficult to implement.

The invention patent with the application number ZL201911287513.4 proposed an ultrasonic grinding spindle in 2019. The device is supported by bearings at the node position of the ultrasonic horn, and is directly connected to the grinding wheel at the front end of the ultrasonic horn adjacent to the node. During the propagation of ultrasonic vibration in the grinding wheel, the vibration of the outer surface of the grinding wheel is the largest, thereby improving the ultrasonic grinding performance. The rigidity and rotation accuracy of the cutting spindle are improved, and the joints do not generate heat, and the overall structure design is reasonable and compact. But it does not involve the installation arrangement of the ultrasonic grinding spindle in the rotary ultrasonic grinding machine and the technological application of the ultrasonic grinding of parts.

The invention patent with the application number ZL201810864416.6 proposed an ultrasonic-assisted grinding device and its application in 2018. The ultrasonic-assisted grinding system consists of a sleeve, a transducer, a horn, a grinding wheel, and a tool holder. It can be used as a general accessory and can be installed on the spindle of a vertical machining center through a standard tool holder to complete the ultrasonic grinding process. The disadvantage is that the ultrasonic excitation route of the grinding wheel is long, and the tool shank and the sleeve are assembled structures, which affect the rigidity and accuracy of the ultrasonic-assisted grinding system. And can only be used as a machine tool spindle attachment to expand the processing capacity of existing machine tools. It cannot be used as the main shaft of the grinding machine to realize the ultrasonic grinding of different surface structures of parts.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a rotary ultrasonic grinding machine tool and its application.

For achieving the above object, the present invention has adopted the following technical solutions:

A rotary ultrasonic grinding spindle includes a grinding wheel, the grinding wheel is mounted on the output end of a horn, a horn flange is arranged in the middle of the horn, and the horn flange is connected to a hollow sleeve. The end face of the horn is connected, the big end mandrel of the horn extends into the hollow sleeve and is connected to the output end face of the transducer, a copper sheet is arranged on the transducer, and the outer surface of the transducer is connected. A positioning flange is arranged in the middle, and the transducer is connected with the inner surface of the hollow sleeve by transition fit through the positioning flange, the hollow sleeve is installed in the support, and the end of the hollow sleeve is connected with the shaft coupling Spindle connection.

Further, two high-speed precision angular contact ball bearings are arranged between the outer surface of the hollow sleeve and the inner surface of the support, and bearing positioning steps are arranged at both ends of the first step of the hollow sleeve for pairing. The inner end face of the inner ring of the high-speed precision angular contact ball bearing is positioned, and two inner cylindrical surface positioning steps are arranged on the inner surface of the support for positioning the inner end face of the outer ring of the high-speed precision angular contact ball bearing. , a left end cover is installed on the left end of the support through a bolt fixing assembly, and the inner ring surface of the left end cover is in close contact with the outer end surface of the outer ring of the left high-speed precision angular contact ball bearing, at the right end of the support A right end cover is installed through the bolt fixing assembly, and a positioning sleeve is arranged between the right end cover and the right high-speed precision angular contact ball bearing, and the left and right end surfaces of the positioning sleeve are respectively connected with the right side of the high-speed precision angular contact ball bearing. The outer end surface of the outer ring is in close contact with the inner ring surface of the right end cap.

Still further, the horn flange is connected with the end face of the hollow sleeve through a screw fixing assembly, a matching ring is provided on the right side of the horn flange, and the outer circumferential surface of the matching ring is connected to the The inner surfaces of the hollow sleeves are in contact.

Further, the grinding wheels are classified into parallel grinding wheels, cup grinding wheels or internal grinding grinding wheels according to their shapes.

Further, the grinding wheels are classified into electroplated diamond grinding wheels, electroplated CBN grinding wheels, brazed diamond grinding wheels and brazed CBN grinding wheels according to abrasives.

A rotary ultrasonic grinding machine tool is composed of four parts: a rotary ultrasonic grinding spindle, an ultrasonic power transmission device, a spindle clamping and lifting device, and a parts clamping and feeding device;

The ultrasonic power transmission device includes an ultrasonic generator, an outer insulated wire and an inner insulated wire, the ultrasonic generator is installed on the upper surface of the support, one end of the outer insulated wire is connected to the output end of the ultrasonic generator, and the The other end of the outer insulated wire is connected to the outer ring of the conductive slip ring, the conductive slip ring is installed on the second step at the rear of the hollow sleeve, and one end of the inner insulated wire is connected to the inner ring of the conductive slip ring , the other end of the inner insulated wire is connected with the copper sheet on the transducer;

The main shaft clamping and lifting device includes a Z-axis ball screw motion pair, a column and a control panel. The Z-axis ball screw motion pair is installed on the column, and is on the slider platform of the Z-axis ball screw motion pair. A support is installed on it, and the control panel is installed on the side of the column;

The parts clamping and feeding device includes a base, an X-axis ball screw motion pair, a Y-axis ball screw motion pair, a T-slot platform and a machine tool fixture, and the X-axis ball screw motion pair is installed on the base, The Y-axis ball screw motion pair is installed on the slider platform of the X-axis ball screw motion pair, the T-slot platform is installed on the slider platform of the Y-axis ball screw motion pair, and the machine tool fixture is installed on a T-slot platform.

An application of a rotary ultrasonic grinding machine for machining hard and brittle material parts.

Further, the specific application method is as follows: install the rotating ultrasonic grinding spindle on the slider platform of the Z-axis ball screw motion pair, clamp the workpiece on the machine tool fixture, input commands on the control panel, and control the parts clamping and clamping. The feeding device clamps the workpiece to realize the feeding movement in the horizontal direction, and controls the Z-axis ball screw motion pair to drive the rotating ultrasonic grinding spindle to realize the feeding movement along the vertical direction of the column. The electric spindle starts to rotate, driving the hollow sleeve to rotate. , the hollow sleeve transmits the torque to the horn, and the horn then drives the grinding wheel to rotate, and the grinding wheel contacts the workpiece for grinding; The inner insulated wire is transmitted to the transducer, and the transducer converts the ultrasonic electrical signal into a mechanical wave. The mechanical wave is transmitted and amplified through the horn, so that the grinding wheel generates ultrasonic mechanical vibration along the axial direction on the basis of the rotary motion. Ultrasonic precision grinding of workpieces.

Further, the ultrasonic vibration mode and the specific feeding mode of the grinding wheel are as follows:

When the grinding wheel is a parallel grinding wheel and performs rotary ultrasonic grinding, the grinding wheel performs ultrasonic pitch-circular transverse bending ultrasonic vibration while rotating, and the grinding wheel also performs feed motion along the Z-axis, and the X-axis ball screw motion pair drives the Y-axis. The axis ball screw motion pair moves back and forth, and at the same time, the Y axis ball screw motion pair drives the machine tool fixture to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane;

When the grinding wheel is a cup-shaped grinding wheel, when the rotary ultrasonic grinding process is performed, the grinding wheel performs ultrasonic axial ultrasonic vibration while rotating. At the same time, the grinding wheel also performs feed motion along the Z axis, and the X-axis ball screw motion pair drives the Y-axis balls. The screw motion pair moves back and forth, and at the same time, the Y-axis ball screw motion pair drives the machine tool fixture to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane;

When the grinding wheel is an internal grinding wheel, and the rotary ultrasonic grinding process is performed, the grinding wheel performs ultrasonic axial ultrasonic vibration while rotating, and the grinding wheel also performs feed motion along the Z axis, and the X-axis ball screw motion pair drives the Y The axis ball screw motion pair moves back and forth, and at the same time, the Y-axis ball screw motion pair drives the machine tool fixture to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane.

Compared with the prior art, the present invention has the following advantages:

In the present invention, the grinding spindle is directly driven by the electric spindle, and different resonance modes are adopted in combination with different structural characteristics of the grinding wheel. Brazed diamond and brazed CBN abrasives can ultrasonically grind hard and brittle materials, improve grinding efficiency, reduce grinding force, grinding heat, reduce grinding burns, improve parts processing quality, and prolong grinding wheel life.

Description of drawings

Fig. 1 is the structural representation of the rotating ultrasonic grinding spindle of the present invention;

Fig. 2 is the sectional view of the rotating ultrasonic grinding spindle of the present invention;

Fig. 3 is the partial enlarged view of circle A in Fig. 2 of the present invention;

Fig. 4 is the exploded view of the rotating ultrasonic grinding spindle of the present invention;

Fig. 5 is the structural representation of the horn of the present invention;

Fig. 6 is the structural representation of the hollow sleeve of the present invention;

Fig. 7 is the structural schematic diagram of the transducer of the present invention;

8 is a schematic structural diagram of the right end cap of the present invention;

Fig. 9 is the structural schematic diagram of the machine tool of the present invention;

Fig. 10 is the structural schematic diagram of the machine tool of the present invention;

11 is a perspective view showing the combined movement direction of the rotating ultrasonic grinding process of the parallel grinding wheel of the present invention;

12 is a perspective view showing the combined motion direction of the rotary ultrasonic grinding process of the cup-shaped grinding wheel of the present invention;

13 is a schematic diagram of an auxiliary rotary ultrasonic grinding process for the cup-shaped grinding wheel of the present invention;

14 is a perspective view of the combined motion direction of the rotary ultrasonic grinding process of the internal grinding wheel of the present invention;

In the figure, rotating ultrasonic grinding spindle-1, ultrasonic power transmission device-2, spindle clamping and lifting device-3, parts clamping and feeding device-4, grinding wheel-101, support-102, horn- 103, horn flange—104, matching ring—105, hollow sleeve—106, transducer—107, copper sheet—108, positioning flange—109, coupling—111, electric spindle—112, right end Cover-113, high-speed precision angular contact ball bearing-116, bearing positioning step-117, inner cylindrical surface positioning step-118, bolt fixing assembly-119, left end cover-120, positioning sleeve-121, ultrasonic generator-201, outer Insulated wire—202, inner insulated wire—203, conductive slip ring—204, Z-axis ball screw motion pair—301, column—302, control panel—303, base—401, X-axis ball screw motion—402, Y-axis ball screw motion pair - 403, T-slot platform - 404, machine tool fixture - 405.

Detailed ways

In order to further illustrate the technical solutions of the present invention, the present invention will be further described below through examples.

As shown in FIGS. 1 to 10 , a rotary ultrasonic grinding spindle includes a grinding wheel 101 , the grinding wheel 101 is installed at the output end of the horn 103 , and a horn method is arranged in the middle of the horn 103 A flange 104, the horn flange 104 is connected with the end face of the hollow sleeve 106 through a screw fixing assembly, a matching ring 105 is provided on the right side of the horn flange 104, and the outer surface of the matching ring 105 is The circumferential surface is in contact with the inner surface of the hollow sleeve 106 , and the large end mandrel of the horn 103 extends into the hollow sleeve 106 and is connected to the output end surface of the transducer 107 . A copper sheet 108 is arranged on the upper part, and a positioning flange 109 is arranged in the middle of the outer surface of the transducer 107. The transducer 107 is connected with the inner surface of the hollow sleeve 106 through the positioning flange The end of the hollow sleeve 106 is connected to the motorized spindle 112 through the coupling 111 , the hollow sleeve 106 is installed in the support 102 , and two holes are arranged between the outer surface of the hollow sleeve 106 and the inner surface of the support 102 . A high-speed precision angular contact ball bearing 116 is provided, and bearing positioning steps 117 are provided at both ends of the first step of the hollow sleeve 106 for positioning the inner end face of the inner ring of the high-speed precision angular contact ball bearing 116, Two inner cylindrical surface positioning steps 118 are provided on the inner surface of the support 102 for positioning the inner end surface of the outer ring of the high-speed precision angular contact ball bearing 116, and the assembly is fixed at the left end of the support 102 by bolts 119 is installed with a left end cover 120, the inner ring surface of the left end cover 120 is in close contact with the outer end surface of the outer ring of the left high-speed precision angular contact ball bearing 116, and a bolt fixing assembly 119 is installed on the right end of the support 102. The right end cover 113 is provided with a positioning sleeve 121 between the right end cover 113 and the right high-speed precision angular contact ball bearing 116. The outer end surface of the outer ring is in close contact with the inner ring surface of the right end cap 113 .

The grinding wheel 101 is divided into parallel grinding wheel, cup grinding wheel or internal grinding wheel according to the shape, and the grinding wheel 101 is divided into electroplating diamond grinding wheel, electroplating CBN grinding wheel, brazing diamond grinding wheel and brazing CBN grinding wheel according to the abrasive material.

A rotary ultrasonic grinding machine is composed of four parts: a rotary ultrasonic grinding spindle 1, an ultrasonic power transmission device 2, a spindle clamping and lifting device 3, and a parts clamping and feeding device 4;

The ultrasonic power transmission device 2 includes an ultrasonic generator 201, an outer insulated wire 202 and an inner insulated wire 203. The ultrasonic generator 201 is installed on the upper surface of the support 102. One end of the outer insulated wire 202 is connected to the ultrasonic generator. The output end of 201 is connected, and the other end of the outer insulated wire 202 is connected to the outer ring of the conductive slip ring 204. The conductive slip ring 204 is installed on the second step at the rear of the hollow sleeve 106. One end of the insulated wire 203 is connected to the inner ring of the conductive slip ring 204, and the other end of the inner insulated wire 203 is connected to the copper sheet 108 on the transducer 107;

The main shaft clamping and lifting device 3 includes a Z-axis ball screw motion pair 301, a column 302 and a control panel 303. The Z-axis ball screw motion pair 301 is installed on the column 302, and the Z-axis ball screw A support 102 is installed on the slider platform of the motion pair 301, and the control panel 303 is installed on the side of the column 302;

The parts clamping and feeding device 4 includes a base 401, an X-axis ball screw motion pair 402, a Y-axis ball screw motion pair 403, a T-slot platform 404 and a machine tool fixture 405. The X-axis ball screw moves The pair 402 is installed on the base 401, the Y-axis ball screw movement pair 403 is installed on the slider platform of the X-axis ball screw movement pair 402, and the T-slot platform 404 is installed on the Y-axis ball screw movement pair On the slider platform of 403 , the machine tool fixture 405 is installed on the T-slot platform 404 .

An application of a rotary ultrasonic grinding machine tool for machining hard and brittle material parts; the specific application method is: install the rotary ultrasonic grinding spindle 1 on the slider platform of the Z-axis ball screw motion pair 301, and clamp the workpiece. Hold it on the machine tool fixture 405, input commands on the control panel 303, control the parts clamping and feeding device 4 to clamp the workpiece to realize the feeding movement in the horizontal direction, and control the Z-axis ball screw motion pair 301 to drive the rotary ultrasonic grinding. The main shaft 1 realizes the feeding movement along the vertical direction of the column 302, the electric main shaft 112 starts to rotate, and drives the hollow sleeve 106 to rotate, the hollow sleeve 106 transmits the torque to the horn 103, and the horn 103 further drives the grinding wheel 101 to rotate The grinding wheel 101 is in contact with the workpiece for grinding; at the same time, the ultrasonic signal output by the control ultrasonic generator 201 is transmitted to the transducer 107 through the outer insulated wire 202, the conductive slip ring 204 and the inner insulated wire 203, and the transducer 107 will The ultrasonic electrical signal is converted into a mechanical wave, and the mechanical wave is transmitted and amplified by the horn 103, so that the grinding wheel 101 generates ultrasonic mechanical vibration along the axial direction on the basis of the rotary motion, and realizes the ultrasonic precision grinding of the workpiece.

The ultrasonic vibration mode and the specific feeding mode of the grinding wheel 101 are as follows:

When the grinding wheel 101 is a parallel grinding wheel and performs rotary ultrasonic grinding, the grinding wheel 101 performs ultrasonic pitch-circular transverse bending ultrasonic vibration while rotating, and at the same time, the grinding wheel 101 also performs feed motion along the Z axis, and the X axis ball screw moves The pair 402 drives the Y-axis ball screw movement pair 403 to move back and forth, and at the same time, the Y-axis ball screw movement pair 403 drives the machine tool fixture 405 to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane;

When the grinding wheel 101 is a cup-shaped grinding wheel, and the rotary ultrasonic grinding process is performed, the grinding wheel 101 performs ultrasonic axial ultrasonic vibration while rotating. At the same time, the grinding wheel 101 also performs a feeding motion along the Z axis, and the X-axis ball screw motion pair 402 Drive the Y-axis ball screw motion pair 403 to move back and forth, and at the same time, the Y-axis ball screw motion pair 403 drives the machine tool fixture 405 to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane;

When the grinding wheel 101 is an internal grinding wheel, and the rotary ultrasonic grinding process is performed, the grinding wheel 101 performs ultrasonic axial ultrasonic vibration while rotating. At the same time, the grinding wheel 101 also performs feed motion along the Z axis, and the X axis ball screw moves The pair 402 drives the Y-axis ball screw movement pair 403 to move back and forth, and at the same time, the Y-axis ball screw movement pair 403 drives the machine tool fixture 405 to move left and right, thereby realizing the feed movement of the workpiece in the horizontal plane.

While the main features and advantages of the present invention have been shown and described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but can, without departing from the spirit or essential characteristics of the present invention, be The present invention may be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A rotary ultrasonic grinding spindle is characterized in that: comprising a grinding wheel (101), the grinding wheel (101) is mounted on the output end of a horn (103), and a variable horn is arranged in the middle of the horn (103). The horn flange (104), the horn flange (104) is connected with the end face of the hollow sleeve (106), and the big end mandrel of the horn (103) extends into the hollow sleeve (106) The inside is connected to the output end face of the transducer (107), a copper sheet (108) is arranged on the transducer (107), and a positioning flange (108) is arranged in the middle of the outer surface of the transducer (107). 109), the transducer (107) is connected by transition fit with the inner surface of the hollow sleeve (106) through the positioning flange (109), and the hollow sleeve (106) is installed in the support (102), so The end of the hollow sleeve (106) is connected with the electric spindle (112) through a coupling (111).
A rotary ultrasonic grinding spindle according to claim 1, wherein two high-speed precision angular contact ball bearings are arranged between the outer surface of the hollow sleeve (106) and the inner surface of the support (102). (116), both ends of the first step of the hollow sleeve (106) are provided with bearing positioning steps (117) for positioning the inner end face of the inner ring of the high-speed precision angular contact ball bearing (116) , two inner cylindrical surface positioning steps (118) are arranged on the inner surface of the support (102) for positioning the inner end surface of the outer ring of the high-speed precision angular contact ball bearing (116). A left end cover (120) is installed on the left end of the (102) through the bolt fixing assembly (119), and the inner ring surface of the left end cover (120) is in close contact with the outer end surface of the outer ring of the left high-speed precision angular contact ball bearing (116). contact, a right end cover (113) is installed on the right end of the support (102) through a bolt fixing assembly (119), between the right end cover (113) and the right high-speed precision angular contact ball bearing (116) A positioning sleeve (121) is provided, and the left and right end surfaces of the positioning sleeve (121) are respectively in close contact with the outer end surface of the outer ring of the right high-speed precision angular contact ball bearing (116) and the inner ring surface of the right end cover (113).
A rotary ultrasonic grinding spindle according to claim 1, characterized in that: the horn flange (104) is connected with the end face of the hollow sleeve (106) through a screw fixing assembly, and the horn flange (104) is connected to the end face of the hollow sleeve (106) through a screw fixing assembly, A matching ring (105) is arranged on the right side of the flange (104), and the outer circumferential surface of the matching ring (105) is in contact with the inner surface of the hollow sleeve (106).
A rotary ultrasonic grinding spindle according to claim 1, wherein the grinding wheel (101) is classified into a parallel grinding wheel, a cup grinding wheel or an internal grinding grinding wheel according to the shape.
A rotary ultrasonic grinding spindle according to claim 1, wherein the grinding wheel (101) is divided into electroplated diamond grinding wheel, electroplated CBN grinding wheel, brazed diamond grinding wheel and brazed CBN grinding wheel according to abrasive material.
The machine tool for applying the rotating ultrasonic grinding spindle according to any one of claims 1-5, characterized in that: the rotating ultrasonic grinding spindle (1), the ultrasonic power transmission device (2), the spindle clamping and lifting device (3) It is composed of four parts with parts clamping and feeding device (4);

The ultrasonic power transmission device (2) comprises an ultrasonic generator (201), an outer insulated wire (202) and an inner insulated wire (203), and the ultrasonic generator (201) is installed on the upper surface of the support (102), One end of the outer insulated wire (202) is connected to the output end of the ultrasonic generator (201), and the other end of the outer insulated wire (202) is connected to the outer ring of the conductive slip ring (204), and the conductive slip ring (204) is connected to the outer ring of the conductive slip ring (204). The ring (204) is installed on the second step at the middle and rear of the hollow sleeve (106), one end of the inner insulated wire (203) is connected to the inner ring of the conductive slip ring (204), the inner insulated wire (203) ) is connected to the copper sheet (108) on the transducer (107);

The spindle clamping and lifting device (3) includes a Z-axis ball screw motion pair (301), a column (302) and a control panel (303), and the Z-axis ball screw motion pair (301) is installed on the column (301). 302), a support (102) is installed on the slider platform of the Z-axis ball screw motion pair (301), and the control panel (303) is installed on the side of the column (302);

The parts clamping and feeding device (4) includes a base (401), an X-axis ball screw motion pair (402), a Y-axis ball screw motion pair (403), a T-slot platform (404) and a machine tool fixture (405), the X-axis ball screw motion pair (402) is installed on the base (401), and the Y-axis ball screw motion pair (403) is installed on the sliding surface of the X-axis ball screw motion pair (402). On the block platform, the T-slot platform (404) is installed on the slider platform of the Y-axis ball screw motion pair (403), and the machine tool fixture (405) is installed on the T-slot platform (404).
The application of a rotary ultrasonic grinding machine tool according to claim 6 is characterized in that: it is used for machining hard and brittle material parts.
The application of a rotary ultrasonic grinding machine tool according to claim 7, characterized in that: the specific application method is: installing the rotary ultrasonic grinding spindle (1) on the sliding surface of the Z-axis ball screw motion pair (301). On the block platform, clamp the workpiece on the machine tool fixture (405), input commands on the control panel (303), and control the parts clamping and feeding device (4) to clamp the workpiece to realize the feeding movement in the horizontal direction, and control the The Z-axis ball screw motion pair (301) drives the rotating ultrasonic grinding spindle (1) to realize the feeding movement along the vertical direction of the column (302), the electric spindle (112) starts to rotate, and drives the hollow sleeve (106) to rotate, The hollow sleeve (106) transmits the torque to the horn (103), and the horn (103) then drives the grinding wheel (101) to make a rotary motion, and the grinding wheel (101) contacts the workpiece for grinding; at the same time, the ultrasonic generation is controlled. The ultrasonic signal output by the device (201) is transmitted to the transducer (107) through the outer insulated wire (202), the conductive slip ring (204) and the inner insulated wire (203), and the transducer (107) converts the ultrasonic electrical signal into The mechanical wave, through the conduction and amplification of the horn (103), causes the grinding wheel (101) to generate ultrasonic mechanical vibration along the axial direction on the basis of the rotary motion, so as to realize the ultrasonic precision grinding of the workpiece.
The application of a kind of rotary ultrasonic grinding machine tool according to claim 8, is characterized in that: the ultrasonic vibration mode and concrete feeding mode of described grinding wheel (101) are as follows:

When the grinding wheel (101) is a parallel grinding wheel and performs rotary ultrasonic grinding, the grinding wheel (101) performs ultrasonic pitch-circular transverse bending ultrasonic vibration while rotating, and at the same time the grinding wheel (101) also performs a feeding motion along the Z axis, The X-axis ball screw motion pair (402) drives the Y-axis ball screw motion pair (403) to move back and forth, and at the same time, the Y-axis ball screw motion pair (403) drives the machine tool fixture (405) to move left and right, thereby realizing the workpiece. Feed movement in the horizontal plane;

When the grinding wheel (101) is a cup-shaped grinding wheel, and the rotary ultrasonic grinding process is performed, the grinding wheel (101) performs ultrasonic axial ultrasonic vibration while rotating, and at the same time, the grinding wheel (101) also performs a feeding motion along the Z axis, and the X axis The ball screw motion pair (402) drives the Y-axis ball screw motion pair (403) to move back and forth, and at the same time, the Y-axis ball screw motion pair (403) drives the machine tool fixture (405) to move left and right, thereby realizing the workpiece in the horizontal plane. feed movement;

When the grinding wheel (101) is an internal grinding wheel, and the rotary ultrasonic grinding process is performed, the grinding wheel (101) performs ultrasonic axial ultrasonic vibration while rotating, and at the same time, the grinding wheel (101) also performs a feeding motion along the Z axis. The X-axis ball screw motion pair (402) drives the Y-axis ball screw motion pair (403) to move back and forth, and at the same time, the Y-axis ball screw motion pair (403) drives the machine tool fixture (405) to move left and right, thereby realizing the workpiece. Feed movement in the horizontal plane.