A composite machine tool

Abstract

The application discloses a composite machining tool, which comprises a bed body, a first static pressure guide rail arranged on the bed body, a first sliding table installed on the first static pressure guide rail, the first sliding table being adapted to reciprocate along a first direction on the first static pressure guide rail, a workpiece spindle arranged on the first sliding table, the workpiece spindle being adapted to install a workpiece, a second static pressure guide rail arranged on the bed body, a second sliding table installed on the second static pressure guide rail, the second sliding table being adapted to reciprocate along a second direction on the second static pressure guide rail, a rotary table arranged on the second sliding table, an ultrasonic vibration auxiliary mirror surface grinding device arranged on the rotary table and adapted to perform inclined shaft ultrasonic vibration auxiliary mirror surface grinding on the workpiece, and a magnetic jet flow polishing device arranged on the rotary table and adapted to perform magnetic jet flow polishing on the workpiece. According to the composite machining tool, the ultrasonic vibration auxiliary mirror surface grinding and the magnetic jet flow polishing can be simultaneously performed on the clamped workpiece, and the machining precision and the machining efficiency of the workpiece are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision machining, and in particular to a compound machining machine tool for small-diameter aspheric mold combining ultrasonic vibration assisted mirror surface grinding with magnetic jet polishing. BACKGROUND

[0002] Aspheric lenses have the advantages of correcting imaging errors, improving imaging quality, simplifying the volume and weight of optical systems, and are widely used in many fields such as optoelectronic communication, national defense and military industry, aerospace, and biomedical science. Since the traditional manual grinding method involves multiple processes such as cutting, chamfering, rough grinding, precision grinding, precision measurement, and error compensation, it is difficult to meet the growing demand for aspheric lenses in terms of quality, efficiency, and cost. Therefore, currently, two production methods, glass mold pressing and plastic injection molding, are used to mass-produce aspheric lenses. However, both of these production methods require a large number of high-precision optical molds with precision much higher than that of the molded aspheric lenses.

[0003] High-precision optical molds are usually made of superhard alloys that are stable in performance at mold pressing temperature. The surface of the mold needs to have nanometer-level surface roughness, submicron-level shape accuracy, and low subsurface damage. The machining of small-diameter aspheric superhard molds generally requires two processes of ultra-precision grinding and polishing. According to the prior art, the machining is sequentially performed on an ultra-precision grinding machine and an ultra-precision polishing machine.

[0004] To avoid interference between the mold and the grinding wheel during ultra-precision grinding, improve the surface quality of the mold, and reduce the wear of the grinding wheel, the grinding wheel shaft is usually inclined at a certain angle relative to the mold shaft, and the machining is performed in a slanting shaft grinding manner. At the same time, a micro-powder diamond grinding wheel is used to grind the mold to obtain a high-precision ultra-smooth surface. Then, the small-diameter aspheric superhard mold is removed from the ultra-precision grinding machine and installed on an ultra-precision polishing machine for ultra-precision polishing to further improve the shape accuracy of the mold while removing grinding marks. The above machining process requires multiple clamping and positioning of the workpiece (small-diameter aspheric superhard mold) on two different machine tools, which is difficult to control the influence of installation errors and tool setting errors on ultra-precision machining accuracy, and also consumes more auxiliary working hours, resulting in low machining efficiency.

[0005] Therefore, there is a need to provide a compound machining machine tool capable of simultaneously implementing ultrasonic vibration assisted mirror surface grinding and magnetic jet polishing. SUMMARY

[0006] Therefore, the present application provides a compound machining machine tool to solve or at least alleviate the above problems.

[0007] According to one aspect of the present application, a composite machining machine tool is provided, comprising: a bed body; a first hydrostatic guideway arranged on the bed body, a first sliding table being mounted on the first hydrostatic guideway, the first sliding table being adapted to reciprocate along a first direction on the first hydrostatic guideway; a workpiece spindle being provided on the first sliding table, the workpiece spindle being adapted to mount a workpiece; a second hydrostatic guideway arranged on the bed body, a second sliding table being mounted on the second hydrostatic guideway, the second sliding table being adapted to reciprocate along a second direction on the second hydrostatic guideway; a rotary table being provided on the second sliding table; an ultrasonic vibration assisted mirror grinding device being provided on the rotary table, the ultrasonic vibration assisted mirror grinding device being adapted to perform inclined axis ultrasonic vibration assisted mirror grinding machining on the workpiece; a magnetic jet polishing device being provided on the rotary table, the magnetic jet polishing device being adapted to perform magnetic jet polishing machining on the workpiece; wherein, after the ultrasonic vibration assisted mirror grinding device performs inclined axis ultrasonic vibration assisted mirror grinding machining on the workpiece, the second sliding table is adapted to move a predetermined distance along the second direction on the second hydrostatic guideway, and the magnetic jet polishing device is adapted to perform magnetic jet polishing machining on the workpiece.

[0008] Optionally, in the composite machining machine tool according to the present application, the ultrasonic vibration assisted mirror grinding device comprises: a first fine adjustment frame; a grinding wheel base being mounted on the first fine adjustment frame; a first rotary support being mounted on the grinding wheel base; an ultrasonic vibration assisted grinding wheel spindle being mounted on the first rotary support; a micro-powder grinding wheel being mounted on one end of the ultrasonic vibration assisted grinding wheel spindle facing the first sliding table; wherein, the ultrasonic vibration assisted mirror grinding device is adapted to adjust the position of the ultrasonic vibration assisted grinding wheel spindle along a first direction, a second direction and a third direction through the first fine adjustment frame, so that the axis of the ultrasonic vibration assisted grinding wheel spindle is within a predetermined angle range with the axis of the workpiece spindle, and the ultrasonic vibration assisted mirror grinding device is adapted to drive the micro-powder grinding wheel to perform inclined axis ultrasonic vibration assisted mirror grinding machining on the workpiece through the ultrasonic vibration assisted grinding wheel spindle.

[0009] Optionally, in the composite machining machine tool according to the present application, the magnetic jet polishing device comprises: a second fine adjustment frame; a magnetic jet polishing base being mounted on the second fine adjustment frame; a magnetic jet polishing nozzle being mounted on the magnetic jet polishing base; a liquid containing disc being mounted on the rotary table; wherein, the magnetic jet polishing device is adapted to adjust the position of the magnetic jet polishing nozzle along a first direction, a second direction and a third direction through the second fine adjustment frame, so that the axis of the magnetic jet polishing nozzle is parallel to the axis of the workpiece spindle, and the magnetic jet polishing device is adapted to perform magnetic jet polishing machining on the workpiece through the magnetic jet polishing nozzle.

[0010] Optionally, in the composite machining machine tool according to the present application, the first linear motor is arranged inside the first hydrostatic guideway; and the first slide table is adapted to reciprocate along the first hydrostatic guideway in a first direction under the drive of the first linear motor.

[0011] Optionally, in the composite machining machine tool according to the present application, the second linear motor is arranged inside the second hydrostatic guideway; and the second slide table is adapted to reciprocate along the second hydrostatic guideway in a second direction under the drive of the second linear motor.

[0012] Optionally, in the composite machining machine tool according to the present application, a spindle support is arranged on the first slide table, and the spindle support is adapted to clamp a workpiece spindle, and a front end of the workpiece spindle is adapted to mount a workpiece.

[0013] Optionally, in the composite machining machine tool according to the present application, a supporting plate is arranged on the rotary table; and the ultrasonic vibration assisted mirror grinding device and the magnetic jet polishing device are fixedly arranged on the supporting plate.

[0014] Optionally, in the composite machining machine tool according to the present application, the magnetic jet polishing device further comprises: a liquid container base, which is mounted on the supporting plate of the rotary table and faces one side of the workpiece first slide table; and the liquid container is mounted on the liquid container base.

[0015] Optionally, in the composite machining machine tool according to the present application, the predetermined angle range is 35°-55°.

[0016] Optionally, in the composite machining machine tool according to the present application, the first direction and the second direction are perpendicular to each other.

[0017] Optionally, in the composite machining machine tool according to the present application, shock absorbers are arranged at four corner positions of the lower end surface of the bed body.

[0018] According to the technical scheme of the application, a composite machining machine tool is provided, which can be applied to machining of small-diameter non-spherical superhard molds, wherein a first static pressure guide rail and a second static pressure guide rail are arranged on a bed body, a first slide table of the first static pressure guide rail can reciprocate along a first direction relative to the first static pressure guide rail, and a workpiece spindle for mounting a workpiece is arranged on the first slide table. A second slide table on the second static pressure guide rail can reciprocate along a second direction relative to the second static pressure guide rail, and a rotating table is arranged on the second slide table, and an ultrasonic vibration assisted mirror surface grinding device and a magnetic jet polishing device are arranged on the rotating table. After the workpiece is mounted, the ultrasonic vibration assisted mirror surface grinding device can be used to perform inclined shaft ultrasonic vibration assisted mirror surface grinding machining on the workpiece, then the second slide table is moved on the second static pressure guide rail along the second direction by a predetermined distance, and the magnetic jet polishing device is used to perform magnetic jet polishing machining on the workpiece. In this way, the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing two machining devices are integrated on a single machine tool, and the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing two processes can be simultaneously realized for a workpiece clamped once, thereby reducing mounting errors and tool setting errors, and improving machining precision and machining efficiency of the workpiece.

[0019] Further, since the ultrasonic vibration assisted grinding device adopts inclined shaft machining, and there is a certain strength axial magnetic field near the magnetic jet polishing nozzle of the magnetic jet polishing device, the magnetic jet beam can be kept in a relatively stable and elongated state within a certain distance, thereby realizing jet polishing of the workpiece. In this way, the size requirement of the workpiece is reduced, and interference phenomenon is avoided, thereby being more suitable for efficient machining of super-precision small-diameter optical molds, and the stability of the super-precision grinding process is improved.

[0020] In addition, the linear motor is used to drive the slide table to move, so that the controllability of the machining path and the machining precision is further improved, which is beneficial to improving the surface quality and shape precision of the workpiece. Moreover, the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing can be continuously performed.

[0021] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to achieve the above and related purposes, certain illustrative aspects will be described herein in connection with the following description and drawings, which are indicative of the various ways in which the principles disclosed herein can be practiced and all aspects and equivalents thereof are intended to fall within the scope of the claimed subject matter. The above and other advantages of the disclosure will become more apparent by describing in detail the following detailed description when read in conjunction with the accompanying drawings. Throughout the disclosure, like reference numerals generally refer to like parts or elements.

[0023] Figure 1 A structural schematic diagram of a compound machining machine tool 100 according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0025] In view of the defects of high-precision optical mold machining technology in the prior art, the present application proposes a compound machining machine tool 100, which can be applied to machining of small-caliber aspheric super-hard molds and other workpieces, and can simultaneously realize ultrasonic vibration assisted mirror grinding and magnetic jet polishing of the workpiece.

[0026] Figure 1 A structural schematic diagram of a compound machining machine tool 100 according to an embodiment of the present application is shown. The compound machining machine tool 100 according to the present application can be used for machining workpieces, such as small-caliber aspheric super-hard molds, but the present application is not limited to the specific types of workpieces.

[0027] As shown in Figure 1 The compound machining machine tool 100 includes a bed body 12, a first hydrostatic guide rail 19, a second hydrostatic guide rail 11, an ultrasonic vibration assisted mirror grinding device 6, and a magnetic jet polishing device 15.

[0028] The first hydrostatic guide rail 19 is arranged on the bed body 12, and specifically, the first hydrostatic guide rail 19 can be laid on the upper surface of the bed body 12. A first sliding table 20 is installed on the first hydrostatic guide rail 19, and specifically, the first sliding table 20 is slidably installed on the first hydrostatic guide rail 19, and the first sliding table 20 can freely reciprocate along a first direction on the first hydrostatic guide rail 19.

[0029] As shown in Figure 1 The first sliding table 20 is provided with a workpiece spindle 2, and the workpiece spindle 2 can be installed with a workpiece, i.e., the workpiece can be installed on the workpiece spindle 2. In an embodiment, the first sliding table 20 is provided with a spindle support 1, and the spindle support 1 is adapted to clamp the workpiece spindle 2, and specifically, the spindle support 1 can clamp and dismount the workpiece spindle 2. The front end of the workpiece spindle 2 can be installed with a workpiece.

[0030] According to an embodiment of the present application, as shown in Figure 1As shown, the second hydrostatic guideway 11 is arranged on the bed body 12, and specifically can be laid on the upper surface of the bed body 12, and is arranged on the other side corresponding to the first slide 20. The second slide 10 is installed on the second hydrostatic guideway 11, and specifically, the second slide 10 is slidably installed on the second hydrostatic guideway 11, and the second slide 10 can freely reciprocate on the second hydrostatic guideway 11 along the second direction.

[0031] In addition, the rotating table 9 is fixedly arranged on the second slide 10, and the rotating table 9 can rotate around the third direction.

[0032] The ultrasonic vibration assisted mirror grinding device 6 can be arranged on the rotating table 9, and the ultrasonic vibration assisted mirror grinding device 6 can be used to perform oblique axis ultrasonic vibration assisted mirror grinding processing on the workpiece. Here, the aspheric surface type of the workpiece can be processed by the oblique axis ultrasonic vibration assisted mirror grinding processing.

[0033] The magnetic jet polishing device 15 can be arranged on the rotating table 9, and the magnetic jet polishing device 15 can be used to perform magnetic jet polishing processing on the workpiece.

[0034] In an embodiment of the present application, the first direction and the second direction are perpendicular to each other, and the third direction is perpendicular to the plane in which the first direction and the second direction are located. Specifically, as shown in the figure, Figure 1 The first direction can be the X-axis direction, the second direction can be the Y-axis direction, and the third direction can be the Z-axis direction.

[0035] According to the embodiment of the present application, in the processing of the workpiece by the composite machining machine tool 100, first, the workpiece can be installed on the front end of the workpiece spindle 2, as shown in the figure, Figure 1 The axis of the workpiece spindle 2 is in the first direction (X-axis direction). Then, the ultrasonic vibration assisted mirror grinding device 6 can be used to perform oblique axis ultrasonic vibration assisted mirror grinding processing on the workpiece. Here, the aspheric surface type of the workpiece can be processed by the oblique axis ultrasonic vibration assisted mirror grinding processing.

[0036] After the oblique axis ultrasonic vibration assisted mirror grinding processing of the aspheric surface type of the workpiece by the ultrasonic vibration assisted mirror grinding device 6 is completed, the second slide 10 is moved (translated) along the second direction on the second hydrostatic guideway 11 by a predetermined distance, so that the second slide 10 and the rotating table 9 (as well as the ultrasonic vibration assisted mirror grinding device 6 and the magnetic jet polishing device 15 arranged on the rotating table 9) are translated along the second direction (Y-axis direction) relative to the workpiece spindle 2 and the workpiece on the first slide 20 by a predetermined distance. In an embodiment, the predetermined distance can be, for example, 200-300 mm. However, it should be pointed out that the present application is not limited to the specific distance of the workpiece spindle translation.

[0037] Further, the workpiece can be subjected to magnetic jet polishing processing by the magnetic jet polishing device 15 (provided on the rotating table 9 on the second sliding table 10).

[0038] It can be seen that the composite machining machine tool 100 according to the present application integrates the ultrasonic vibration assisted mirror grinding and the magnetic jet polishing two kinds of machining devices on a single machine tool, so that the ultrasonic vibration assisted mirror grinding and the magnetic jet polishing two kinds of processes can be simultaneously realized for a clamped workpiece, thereby reducing the installation error and the tool setting error, and improving the machining precision and the machining efficiency of the workpiece.

[0039] In an embodiment of the present application, as shown in Figure 1 A supporting plate 8 is fixedly arranged on the rotating table 9. The ultrasonic vibration assisted mirror grinding device 6 and the magnetic jet polishing device 15 can be fixedly arranged on the supporting plate 8 of the rotating table 9.

[0040] In an embodiment of the present application, the ultrasonic vibration assisted mirror grinding device 6 and the magnetic jet polishing device 15 each include a fine adjustment frame, which can be a three-axis fine adjustment frame and can adjust the angle in three directions.

[0041] As shown in Figure 1 The ultrasonic vibration assisted mirror grinding device 6 includes a first fine adjustment frame, a grinding wheel base 7, a first rotating support 5, an ultrasonic vibration assisted grinding wheel spindle 4, and a micro-powder grinding wheel 3.

[0042] The grinding wheel base 7 is mounted on the first fine adjustment frame. The first rotating support 5 is mounted on the grinding wheel base 7. The ultrasonic vibration assisted grinding wheel spindle 4 is fixedly mounted on the first rotating support 5. The micro-powder grinding wheel 3 is mounted on the ultrasonic vibration assisted grinding wheel spindle 4 and faces one end of the first sliding table 20.

[0043] The first fine adjustment frame of the ultrasonic vibration assisted mirror grinding device 6 can fine-tune the position of the ultrasonic vibration assisted grinding wheel spindle 4 in the first direction, the second direction, and the third direction.

[0044] In this embodiment, by mounting the workpiece on the front end of the workpiece spindle 2, the ultrasonic vibration assisted mirror grinding device 6 can adjust the position of the ultrasonic vibration assisted grinding wheel spindle 4 in the first direction, the second direction, and the third direction through the first fine adjustment frame, so that the axis of the ultrasonic vibration assisted grinding wheel spindle 4 and the axis of the workpiece spindle 2 form a predetermined angle range. Further, the ultrasonic vibration assisted mirror grinding device 6 can drive the micro-powder grinding wheel 3 to perform inclined-axis ultrasonic vibration assisted mirror grinding processing on the aspheric surface of the workpiece through the ultrasonic vibration assisted grinding wheel spindle 4.

[0045] In this embodiment, as shown in Figure 1 The first direction, the second direction, and the third direction can be the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.

[0046] In one embodiment, the predetermined angle range can be 35°-55°. However, it should be noted that the present application is not limited to a specific angle between the axis of the ultrasonic vibration assisted grinding wheel spindle 4 and the axis of the workpiece spindle 2.

[0047] In one embodiment of the present application, as shown in Figure 1 The magnetic jet polishing device 15 includes a second fine adjustment frame, a magnetic jet polishing base 14, a magnetic jet polishing nozzle 16, and a liquid pool 18.

[0048] The magnetic jet polishing base 14 is installed on the second fine adjustment frame. The magnetic jet polishing nozzle 16 is installed on the magnetic jet polishing base 14. The liquid pool 18 is installed on the supporting plate 8 of the rotary table 9.

[0049] Through the second fine adjustment frame of the magnetic jet polishing device 15, the position of the magnetic jet polishing nozzle 16 can be finely adjusted in the first direction, the second direction, and the third direction.

[0050] Further, the magnetic jet polishing device 15 further includes a liquid pool base 17, which is installed on the supporting plate 8 of the rotary table 9 and faces the side of the workpiece first sliding table 20. The liquid pool 18 is installed on the liquid pool base 17.

[0051] In this embodiment, the magnetic jet polishing device 15 can adjust the position of the magnetic jet polishing nozzle 16 in the first direction, the second direction, and the third direction through the second fine adjustment frame, so that the axis of the magnetic jet polishing nozzle 16 is parallel to the axis of the workpiece spindle 2. Further, the magnetic jet polishing device 15 can perform magnetic jet polishing processing on the workpiece through the magnetic jet polishing nozzle 16.

[0052] In this embodiment, the first direction, the second direction, and the third direction can be the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.

[0053] According to the above embodiment of the present application, since the ultrasonic vibration assisted grinding device 6 adopts inclined shaft processing, there is a certain strength of axial magnetic field near the magnetic jet polishing nozzle 16 of the magnetic jet polishing device 15, so that the magnetic jet beam can maintain a relatively stable and elongated state within a certain distance, thereby realizing jet polishing on the workpiece. In this way, while reducing the size requirements of the workpiece, the occurrence of interference phenomenon can be avoided, thereby being more suitable for efficient processing of ultra-precision small caliber optical molds, and improving the stability of the ultra-precision grinding process.

[0054] In one embodiment of the present application, the first static pressure guide rail 19 includes a first linear motor inside. The first sliding table 20 can freely reciprocate along the first direction on the first static pressure guide rail 19 under the electromagnetic force driving of the first linear motor.

[0055] The interior of the second hydrostatic guideway 11 comprises a second linear motor. The second slide table 10 can be driven by the electromagnetic force of the second linear motor to freely reciprocate along the second hydrostatic guideway 11 in a second direction.

[0056] Thus, after the oblique-axis ultrasonic vibration assisted mirror surface grinding of the aspheric surface of the workpiece is completed by the ultrasonic vibration assisted mirror surface grinding device 6, the second slide table 10 can be driven by the electromagnetic force of the second linear motor to move (translate) a predetermined distance along the second hydrostatic guideway 11 in the second direction, so that the second slide table 10 and the rotary table 9 (as well as the ultrasonic vibration assisted mirror surface grinding device 6 and the magnetic jet polishing device 15 arranged on the rotary table 9) are translated a predetermined distance in the second direction (Y-axis direction) relative to the workpiece spindle 2 and the workpiece on the first slide table 20. Furthermore, the magnetic jet polishing of the workpiece can be performed by the magnetic jet polishing device 15 (arranged on the rotary table 9 of the second slide table 10).

[0057] In this embodiment, the composite machining machine tool 100 of the present application drives the slide table to move by using a linear motor, so that the controllability of the machining path and machining precision is further improved, which is beneficial to improve the surface quality and shape precision of the workpiece. Moreover, the ultrasonic vibration assisted mirror surface grinding and magnetic jet polishing can be continuously performed.

[0058] In one embodiment of the present application, as shown in Figure 1 The lower end surface of the bed body 12 is provided with a shock absorber 13 at each corner, and the shock absorber 13 can realize the shock absorption of the bed body, so as to realize the effect of shock absorption of the composite machining machine tool 100 during the machining of the workpiece. In one implementation, the bed body 12 can be made of natural marble.

[0059] According to one implementation, the first hydrostatic guideway 19 can comprise two, and the first hydrostatic guideway 19 can be implemented as a full-constraint oil hydrostatic closed guideway. As shown in Figure 1 The two first hydrostatic guideways 19 can be laid on the left side area of the upper surface of the bed body 12. The first hydrostatic guideway 19 is internally provided with a first linear motor.

[0060] The first slide table 20 can be made of aluminum alloy casting, and the first slide table 20 can be installed in a clamping manner between the two first hydrostatic guideways 19. The first slide table 20 can be driven by the electromagnetic force of the first linear motor to freely reciprocate in the X-axis direction of the bed body 12 on the first hydrostatic guideway 19, and the first slide table 20 is provided with a spindle support 1 which can clampingly load and unload the workpiece spindle 2.

[0061] According to one implementation, the second hydrostatic guideway 11 can comprise two, and the second hydrostatic guideway 11 can also be implemented as a full-constraint oil hydrostatic closed guideway. As shown inFigure 1 As shown, two second hydrostatic guideways 11 can be laid on the right area of the upper surface of the bed body 12. The second hydrostatic guideways 11 are internally installed with second linear motors.

[0062] The second slide table 10 can also be formed by aluminum alloy casting, and the second slide table 10 can be installed in a clamping manner between the two second hydrostatic guideways 11. The second slide table 10 can be driven by the electromagnetic force of the second linear motor to freely reciprocate along the Y-axis direction of the bed body 12 on the second hydrostatic guideways 11.

[0063] According to the composite machining machine tool, the first slide table on the first hydrostatic guideway can reciprocate along the first direction relative to the first hydrostatic guideway, and the first slide table is provided with a workpiece spindle for mounting a workpiece. The second slide table on the second hydrostatic guideway can reciprocate along the second direction relative to the second hydrostatic guideway, and the second slide table is provided with a rotary table, and the rotary table is provided with an ultrasonic vibration assisted mirror surface grinding device and a magnetic jet polishing device. After the workpiece is mounted, the ultrasonic vibration assisted mirror surface grinding device can be used to perform inclined shaft ultrasonic vibration assisted mirror surface grinding processing on the workpiece, then the second slide table is moved along the second direction on the second hydrostatic guideway by a predetermined distance, and then the magnetic jet polishing device is used to perform magnetic jet polishing processing on the workpiece. In this way, the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing devices are integrated on a single machine tool, and the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing processes can be simultaneously realized on a single clamped workpiece, thereby reducing installation errors and tool setting errors, and improving the processing precision and efficiency of the workpiece.

[0064] Further, since the ultrasonic vibration assisted grinding device adopts inclined shaft processing, and there is a certain strength of axial magnetic field near the magnetic jet polishing nozzle of the magnetic jet polishing device, the magnetic jet beam can maintain a relatively stable and slender state within a certain distance, thereby realizing jet polishing of the workpiece. In this way, the size requirement of the workpiece is reduced, and the interference phenomenon is avoided, thereby being more suitable for efficient machining of ultra-precision small-caliber optical molds, and improving the stability of the ultra-precision grinding process.

[0065] In addition, the linear motor is used to drive the movement of the slide table, so that the controllability of the machining path and the machining precision is further improved, which is beneficial to improve the surface quality and shape precision of the workpiece. Moreover, the ultrasonic vibration assisted mirror surface grinding and the magnetic jet polishing can be continuously performed.

[0066] In the description of the present specification, the terms "connection", "fixation" and the like should be understood in a broad sense unless otherwise explicitly specified and limited. In addition, the terms "front", "back", "upper", "lower", "inner", "outer", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In the description provided herein, a large number of specific details are explained. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of the present description.

[0068] Similarly, it is to be understood that the features of the present application that are of a conventional nature can be implemented to form a single embodiment, figure, or description thereof, in order to simplify the present disclosure and to help the understanding of one or more of the various inventive aspects. However, the method of the present disclosure should not be interpreted as reflecting an intention to abandon more features than those explicitly recited in each claim. Therefore, the claims that follow the DETAILED DESCRIPTION are hereby expressly incorporated into this DETAILED DESCRIPTION, in which each claim is considered a separate embodiment of the present application.

[0069] Those skilled in the art will understand that the modules or units or components of the devices in the examples disclosed herein can be arranged in the devices as described in the examples, or alternatively can be located in one or more devices different from the devices in the examples. The modules in the foregoing examples can be combined into one module or can be further divided into multiple sub-modules.

[0070] Those skilled in the art can understand that the modules in the devices in the examples can be adaptively changed and arranged in one or more devices different from the examples. The modules or units or components in the examples can be combined into one module or unit or component, and can be further divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in the present specification (including the accompanying claims, abstract and drawings) and all processes or units of any method or device so disclosed can be combined in any combination. Unless explicitly stated otherwise, each feature disclosed in the present specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0071] Furthermore, to one skilled in the art, and as context can dictate, "exemplary" can mean "encompassing but not limited to" and "comprises" can mean "includes, but is not limited to." Moreover, unless otherwise specified, all compositions adjuvants, and methods described herein can include prodrug, protected variations, and / or pharmaceutically acceptable salts thereof. In addition, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is also possible in the practice of the present application that various embodiments can not be limited to the specific embodiments described.

[0072] As used herein, unless otherwise specified, the use of the ordinal adjectives "first," "second," "third," etc., merely to distinguish different instances of a same object, and are not intended to imply that a sequence or order to those objects were either made, maintained, or otherwise significant.

[0073] While the application has been described in terms of several embodiments, those skilled in the art will recognize that the application can be practiced with modifications and alterations limited only by the spirit and scope of the inventiveness. Furthermore, the purpose of the description is to enable any person skilled in the art to practice the application as described in the specification and claimed claims. The contexts should not be construed as limiting of the scope of the application. Therefore, no limitation is to be implied therefrom. The specification is to be regarded as illustrative, rather than a limitation on the scope or perimeters of the application.

Claims

1. A composite machining tool, comprising: Bed frame; A first hydrostatic guide rail is arranged on the bed, and a first slide is installed on the first hydrostatic guide rail. The first slide is adapted to reciprocate along a first direction on the first hydrostatic guide rail. A workpiece spindle is provided on the first slide, and the workpiece spindle is adapted to install a workpiece, the workpiece including a small-diameter aspherical superhard mold. A second hydrostatic guide rail is arranged on the bed, and a second slide is installed on the second hydrostatic guide rail. The second slide is adapted to reciprocate along a second direction on the second hydrostatic guide rail; a rotary table is provided on the second slide. An ultrasonic vibration-assisted mirror grinding device is disposed on the rotary table and is suitable for performing oblique-axis ultrasonic vibration-assisted mirror grinding on the aspherical surface of the workpiece. The ultrasonic vibration-assisted mirror grinding device includes: a first fine-tuning frame; a grinding wheel base mounted on the first fine-tuning frame; a first rotating support mounted on the grinding wheel base; an ultrasonic vibration-assisted grinding wheel spindle mounted on the first rotating support; and a micro-powder grinding wheel mounted on one end of the ultrasonic vibration-assisted grinding wheel spindle facing the first slide table. The ultrasonic vibration-assisted mirror grinding device is adapted to adjust the position of the ultrasonic vibration-assisted grinding wheel spindle along a first direction, a second direction, and a third direction via the first fine-tuning frame, so that the axis of the ultrasonic vibration-assisted grinding wheel spindle forms a predetermined angle range with the axis of the workpiece spindle, and is adapted to drive the micro-powder grinding wheel via the ultrasonic vibration-assisted grinding wheel spindle to perform oblique-axis ultrasonic vibration-assisted mirror grinding on the aspherical surface of the workpiece. A magnetic jet polishing device, mounted on the rotary table, is suitable for performing magnetic jet polishing on the workpiece. The device includes: a second fine-tuning frame; a magnetic jet polishing base mounted on the second fine-tuning frame; a magnetic jet polishing nozzle mounted on the magnetic jet polishing base, wherein an axial magnetic field of a certain strength exists near the nozzle to maintain a relatively stable and slender magnetic jet beam within a certain distance, thereby achieving magnetic jet polishing of the workpiece; and a liquid collection tray mounted on the rotary table. The device is adapted to adjust the position of the magnetic jet polishing nozzle along a first direction, a second direction, and a third direction using the second fine-tuning frame, so that the axis of the nozzle is parallel to the axis of the workpiece's main shaft, and is suitable for performing magnetic jet polishing on the workpiece through the nozzle. After the ultrasonic vibration-assisted mirror grinding device performs oblique-axis ultrasonic vibration-assisted mirror grinding on the aspherical surface of the workpiece, the second slide is adapted to move a predetermined distance along the second direction on the second hydrostatic guide rail, and perform magnetic jet polishing on the workpiece through the magnetic jet polishing device.

2. The machine tool as described in claim 1, wherein, The first hydrostatic guide rail includes a first linear motor inside; The first slide is adapted to reciprocate along a first direction on the first hydrostatic guide rail under the drive of the first linear motor.

3. The machine tool as described in claim 1, wherein, The second hydrostatic guide rail includes a second linear motor inside; The second slide is adapted to reciprocate along the second direction on the second hydrostatic guide rail under the drive of the second linear motor.

4. The machine tool as described in any one of claims 1-3, wherein, The first slide is provided with a spindle support, which is adapted to hold the workpiece spindle, and the front end of the workpiece spindle is adapted to install the workpiece.

5. The machine tool as described in any one of claims 1-3, wherein, The rotating platform is equipped with a tray; The ultrasonic vibration-assisted mirror grinding device and the magnetic jet polishing device are fixedly mounted on the support plate.

6. The machine tool as claimed in any one of claims 1-3, wherein, The magnetic jet polishing apparatus further includes: A liquid-collecting tray base is mounted on the support plate of the rotary table on the side facing the first slide of the workpiece; The liquid collection tray is mounted on the base of the liquid collection tray.

7. The machine tool as claimed in any one of claims 1-3, wherein, The predetermined angle range is 35° to 55°.

8. The machine tool as claimed in any one of claims 1-3, wherein, The first direction and the second direction are perpendicular to each other.

9. The machine tool as claimed in any one of claims 1-3, wherein, Shock absorbers are provided at the four corners of the lower end face of the bed.

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